**⚠️ Warning: This is a draft ⚠️**

This means it might contain formatting issues, incorrect code, conceptual problems, or other severe issues.

If you want to help to improve and eventually enable this page, please fork RosettaGit's repository and open a merge request on GitHub.

{{task|Games}}

;Task: Write a game (computer program) that follows the following rules: ::* The computer chooses a number between given set limits. ::* The player is asked for repeated guesses until the the target number is guessed correctly ::* At each guess, the computer responds with whether the guess is: :::::* higher than the target, :::::* equal to the target, :::::* less than the target, or :::::* the input was inappropriate.

;Related task:

- [[Guess the number/With Feedback (Player)]]

## Ada

```
with Ada.Numerics.Discrete_Random;
with Ada.Text_IO;
procedure Guess_Number_Feedback is
procedure Guess_Number (Lower_Limit : Integer; Upper_Limit : Integer) is
subtype Number is Integer range Lower_Limit .. Upper_Limit;
package Number_IO is new Ada.Text_IO.Integer_IO (Number);
package Number_RNG is new Ada.Numerics.Discrete_Random (Number);
Generator : Number_RNG.Generator;
My_Number : Number;
Your_Guess : Number;
begin
Number_RNG.Reset (Generator);
My_Number := Number_RNG.Random (Generator);
Ada.Text_IO.Put_Line ("Guess my number!");
loop
Ada.Text_IO.Put ("Your guess: ");
Number_IO.Get (Your_Guess);
exit when Your_Guess = My_Number;
if Your_Guess > My_Number then
Ada.Text_IO.Put_Line ("Wrong, too high!");
else
Ada.Text_IO.Put_Line ("Wrong, too low!");
end if;
end loop;
Ada.Text_IO.Put_Line ("Well guessed!");
end Guess_Number;
package Int_IO is new Ada.Text_IO.Integer_IO (Integer);
Lower_Limit : Integer;
Upper_Limit : Integer;
begin
loop
Ada.Text_IO.Put ("Lower Limit: ");
Int_IO.Get (Lower_Limit);
Ada.Text_IO.Put ("Upper Limit: ");
Int_IO.Get (Upper_Limit);
exit when Lower_Limit < Upper_Limit;
Ada.Text_IO.Put_Line ("Lower limit must be lower!");
end loop;
Guess_Number (Lower_Limit, Upper_Limit);
end Guess_Number_Feedback;
```

## ALGOL 68

{{works with|ALGOL 68G|Any - tested with release 2.8.win32}}

```
# simple guess-the-number game #
main:(
BOOL valid input := TRUE;
# register an error handler so we can detect and recover from #
# invalid input #
on value error( stand in
, ( REF FILE f )BOOL:
BEGIN
valid input := FALSE;
TRUE
END
);
# construct a random integer between 1 and 100 #
INT number = 1 + ROUND ( random * 99 );
print( ( "I'm thinking of a number between 1 and 100", newline ) );
# read the user's guesses until they guess correctly #
# we give feedback so they can find the number using interval #
# halving #
WHILE
print( ( "What do you think it is? " ) );
INT guess;
WHILE
valid input := TRUE;
read( ( guess, newline ) );
NOT valid input
DO
print( ( "Please guess a number between 1 and 100", newline ) )
OD;
number /= guess
DO
IF number > guess
THEN
# the user's guess was too small #
print( ( newline, "My number is higher than that", newline ) )
ELSE
# the user's guess was too large #
print( ( newline, "My number is lower than that", newline ) )
FI
OD;
print( ( "That's correct!", newline ) )
)
```

{{out}}

```
I'm thinking of a number between 1 and 100
What do you think it is? f
Please guess a number between 1 and 100
q
Please guess a number between 1 and 100
50
My number is higher than that
What do you think it is? 75
My number is lower than that
What do you think it is? 67
My number is higher than that
What do you think it is? 72
My number is higher than that
What do you think it is? 73
That's correct!
```

## AppleScript

-- defining the range of the number to be guessed property minLimit : 1 property maxLimit : 100 on run -- define the number to be guessed set numberToGuess to (random number from minLimit to maxLimit) -- prepare a variable to store the user's answer set guessedNumber to missing value -- prepare a variable for feedback set tip to "" -- start a loop (will be exited by using "exit repeat" after a correct guess) repeat -- ask the user for his/her guess, the variable tip contains text after first guess only set usersChoice to (text returned of (display dialog "Guess the number between " & minLimit & " and " & maxLimit & " inclusive" & return & tip default answer "" buttons {"Check"} default button "Check")) -- try to convert the given answer to an integer and compare it the number to be guessed try set guessedNumber to usersChoice as integer if guessedNumber is greater than maxLimit or guessedNumber is less than minLimit then -- the user guessed a number outside the given range set tip to "(Tipp: Enter a number between " & minLimit & " and " & maxLimit & ")" else if guessedNumber is less than numberToGuess then -- the user guessed a number less than the correct number set tip to "(Tipp: The number is greater than " & guessedNumber & ")" else if guessedNumber is greater than numberToGuess then -- the user guessed a number greater than the correct number set tip to "(Tipp: The number is less than " & guessedNumber & ")" else if guessedNumber is equal to numberToGuess then -- the user guessed the correct number and gets informed display dialog "Well guessed! The number was " & numberToGuess buttons {"OK"} default button "OK" -- exit the loop (quits this application) exit repeat end if on error -- something went wrong, remind the user to enter a numeric value set tip to "(Tipp: Enter a number between " & minLimit & " and " & maxLimit & ")" end try end repeat end run

## AutoHotkey

```
MinNum = 1
MaxNum = 99999999999
Random, RandNum, %MinNum%, %MaxNum%
Loop
{
InputBox, Guess, Number Guessing, Please enter a number between %MinNum% and %MaxNum%:,, 350, 130,,,,, %Guess%
If ErrorLevel
ExitApp
If Guess Is Not Integer
{
MsgBox, 16, Error, Invalid guess.
Continue
}
If Guess Not Between %MinNum% And %MaxNum%
{
MsgBox, 16, Error, Guess must be a number between %MinNum% and %MaxNum%.
Continue
}
If A_Index = 1
TotalTime = %A_TickCount%
Tries = %A_Index%
If Guess = %RandNum%
Break
If Guess < %RandNum%
MsgBox, 64, Incorrect, The number guessed (%Guess%) was too low.
If Guess > %RandNum%
MsgBox, 64, Incorrect, The number guessed (%Guess%) was too high.
}
TotalTime := Round((A_TickCount - TotalTime) / 1000,1)
MsgBox, 64, Correct, The number %RandNum% was guessed in %Tries% tries, which took %TotalTime% seconds.
```

## AWK

```
# syntax: GAWK -f GUESS_THE_NUMBER_WITH_FEEDBACK.AWK
BEGIN {
L = 1
H = 100
srand()
n = int(rand() * (H-L+1)) + 1
printf("I am thinking of a number between %d and %d. Try to guess it.\n",L,H)
while (1) {
getline ans
if (ans !~ /^[0-9]+$/) {
print("Your input was not a number. Try again.")
continue
}
if (n == ans) {
print("Well done you.")
break
}
if (n > ans) {
print("Incorrect, your answer was too low. Try again.")
continue
}
if (n < ans) {
print("Incorrect, your answer was too high. Try again.")
continue
}
}
exit(0)
}
```

## BASIC

=

## Applesoft BASIC

=

```
100 L% = 1
110 U% = 10
120 N% = RND(1) * (U% - L% + 1) + L%
130 PRINT "A NUMBER FROM " L%;
140 PRINT " TO " U%;
150 PRINT ", CALLED A TARGET, HAS BEEN RANDOMLY CHOSEN."
160 FOR Q = 0 TO 1 STEP 0
170 INPUT "GUESS THE TARGET NUMBER: "; G%
180 IF G% < L% OR G% > U% THEN PRINT "THE INPUT WAS INAPPROPRIATE."
190 IF G% > N% THEN PRINT "THE GUESS WAS HIGHER THAN THE TARGET."
200 IF G% < N% THEN PRINT "THE GUESS WAS LESS THAN THE TARGET."
210 Q = G% = N%
220 NEXT
230 PRINT "THE GUESS WAS EQUAL TO THE TARGET."
```

=

## BASIC256

= {{works with|BASIC256 }}

```
Min = 5: Max = 15
chosen = int(rand*(Max-Min+1)) + Min
print "Guess a whole number between "+Min+" and "+Max
do
input "Enter your number " ,guess
if guess < Min OR guess > Max then
print "That was an invalid number"
end
else
if guess < chosen then print "Sorry, your number was too low"
if guess > chosen then print "Sorry, your number was too high"
if guess = chosen then print "Well guessed!"
end if
until guess = chosen
```

Output:(example)

```
Guess a whole number between 5 and 15
Enter your number 10
Sorry, your number was too high
Enter your number 7
Sorry, your number was too low
Enter your number 8
Well guessed!
```

==={{header|IS-BASIC}}===

```
## Batch File
```dos
@echo off
:A
set /a number=%random% %% 10 + 1
:B
set /p guess=Choose a number between 1 and 10:
if %guess equ %number% goto win
if %guess% gtr 10 msg * "Number must be between 1 and 10."
if %guess% leq 0 msg * "Number must be between 1 and 10."
if %guess% gtr %number% echo Higher!
if %guess% lss %number% echo Lower!
goto B
:win
cls
echo You won! The number was %number%
pause>nul
goto A
```

## BBC BASIC

```
Min% = 1
Max% = 10
chosen% = RND(Max%-Min%+1) + Min% - 1
REPEAT
PRINT "Guess a number between "; Min% " and " ;Max% ;
INPUT ": " guess%
CASE TRUE OF
WHEN guess% < Min% OR guess% > Max%:
PRINT "That was an invalid number"
WHEN guess% < chosen%:
PRINT "Sorry, your number was too low"
WHEN guess% > chosen%:
PRINT "Sorry, your number was too high"
OTHERWISE:
PRINT "Well guessed!"
EXIT REPEAT
ENDCASE
UNTIL FALSE
END
```

## Befunge

The number range is hardcoded at the start of the program (`1:"d"` being 1 to 100), but can easily be changed.

```
1:"d">>048*"neewteb rebmun a sseuG">:#,_$\:.\"d na",,\,,:.55+,\-88+0v
<*2\_$\1+%+48*">",,#v>#+:&#>#5-:!_0`00p0"hgih"00g>_0"wol"00g!>_48vv1?
\1-:^v"d correctly!"<^,,\,+55,". >"$_,#!>#:<"Your guess was too"*<>+>
:#,_@>"ess" >"eug uoY">
```

{{out}}

```
Guess a number between 1 and 100
> 50
Your guess was too high.
> 25
Your guess was too low.
> 37
Your guess was too high.
> 31
You guessed correctly!
```

## Brat

```
number = random 10
p "Guess a number between 1 and 10."
until {
guess = ask("Guess: ").to_i
true? (guess.null? || { guess > 10 || guess < 1 })
{ p "Please guess a number between 1 and 10."}
{ true? guess == number
{ p "Correct!"; true }
{ true? guess < number
{ p "Too low!" }
{ p "Too high!" }
}
}
}
```

## C

#include <iostream> #include <stdio.h> #include <time.h> #define lower_limit 0 #define upper_limit 100 int main(){ int number, guess; srand( time( 0 ) ); number = lower_limit + rand() % (upper_limit - lower_limit + 1); printf( "Guess the number between %d and %d: ", lower_limit, upper_limit ); while( scanf( "%d", &guess ) == 1 ){ if( number == guess ){ printf( "You guessed correctly!\n" ); break; } printf( "Your guess was too %s.\nTry again: ", number < guess ? "high" : "low" ); } return 0; }

Demonstration:

```
Guess the number between 0 and 100: 50
Your guess was too low.
Try again: 75
Your guess was too high.
Try again: 63
Your guess was too high.
Try again: 57
Your guess was too low.
Try again: 60
Your guess was too high.
Try again: 58
Your guess was too low.
Try again: 59
You guessed correctly!
```

## C++

#include <iostream> #include <cstdlib> #include <ctime> int main() { std::srand(std::time(0)); int lower, upper, guess; std::cout << "Enter lower limit: "; std::cin >> lower; std::cout << "Enter upper limit: "; std::cin >> upper; int random_number = lower + std::rand() % ((upper + 1) - lower); do { std::cout << "Guess what number I have: "; std::cin >> guess; if (guess > random_number) std::cout << "Your guess is too high\n"; else if (guess < random_number) std::cout << "Your guess is too low\n"; else std::cout << "You got it!\n"; } while (guess != random_number); return 0; }

Output:

```
Enter lower limit: 1
Enter upper limit: 100
Guess what number I have: 50
Your guess is too high
Guess what number I have: 40
Your guess is too high
Guess what number I have: 25
Your guess is too high
Guess what number I have: 10
Your guess is too high
Guess what number I have: 2
Your guess is too low
Guess what number I have: 4
Your guess is too high
Guess what number I have: 3
You got it!
```

## C#

using System; class Program { static void Main(string[] args) { const int from = 1; const int to = 10; int randomNumber = new Random().Next(from, to); int guessedNumber; Console.Write("The number is between {0} and {1}. ", from, to); while (true) { Console.Write("Make a guess: "); if (int.TryParse(Console.ReadLine(), out guessedNumber)) { if (guessedNumber == randomNumber) { Console.WriteLine("You guessed the right number!"); break; } else { Console.WriteLine("Your guess was too {0}.", (guessedNumber > randomNumber) ? "high" : "low"); } } else { Console.WriteLine("Input was not an integer."); } } Console.WriteLine(); Console.WriteLine("Press any key to exit."); Console.ReadKey(); } }

Output:

```
The number is between 1 and 10. Make a guess: 1
Your guess was too low.
Make a guess: 9
Your guess was too high.
Make a guess: 5
Your guess was too low.
Make a guess: 6
Your guess was too low.
Make a guess: hello, world
Input was not an integer.
Make a guess: 7
You guessed the right number!
Press any key to exit.
```

=={{header|Caché ObjectScript}}== <lang Caché ObjectScript>GUESSNUM ; get a random number between 1 and 100 set target = ($random(100) + 1) ; $r(100) gives 0-99

; loop until correct set tries = 0 for { write !,"Guess the integer between 1 and 100: " read "",guess ; gets input following write ; validate input if (guess?.N) && (guess > 0) && (guess < 101) { ; increment attempts set tries = tries + 1 ; evaluate the guess set resp = $select(guess < target:"too low.",guess > target:"too high.",1:"correct!") ; display result, conditionally exit loop write !,"Your guess was "_resp quit:resp="correct!" } else { write !,"Please enter an integer between 1 and 100." } } ; guess loop write !!,"You guessed the number in "_tries_" attempts." quit

```
{{out}}
```txt
SAMPLES>do ^GUESSNUM^
Guess the integer between 1 and 100: 50
Your guess was too low.
Guess the integer between 1 and 100: 75
Your guess was too high.
Guess the integer between 1 and 100: 60
Your guess was too low.
Guess the integer between 1 and 100: 65
Your guess was too low.
Guess the integer between 1 and 100: 70
Your guess was too low.
Guess the integer between 1 and 100: 73
Your guess was too low.
Guess the integer between 1 and 100: 74
Your guess was correct!
You guessed the number in 7 attempts.
```

## Ceylon

In you module.ceylon file put import ceylon.random "1.3.1";

```
import ceylon.random {
DefaultRandom
}
shared void run() {
value random = DefaultRandom();
value range = 1..10;
while(true) {
value chosen = random.nextElement(range);
print("I have chosen a number between ``range.first`` and ``range.last``.
What is your guess?");
while(true) {
if(exists line = process.readLine()) {
value guess = Integer.parse(line.trimmed);
if(is ParseException guess) {
print(guess.message);
continue;
}
switch(guess <=> chosen)
case (larger) {
print("Too high!");
}
case (smaller) {
print("Too low!");
}
case (equal) {
print("You got it!");
break;
}
} else {
print("Please enter a number!");
}
}
}
}
```

## Clojure

(defn guess-run [] (let [start 1 end 100 target (+ start (rand-int (inc (- end start))))] (printf "Guess a number between %d and %d" start end) (loop [i 1] (printf "Your guess %d:\n" i) (let [ans (read)] (if (cond (not (number? ans)) (println "Invalid format") (or (< ans start) (> ans end)) (println "Out of range") (< ans target) (println "too low") (> ans target) (println "too high") :else true) (println "Correct") (recur (inc i)))))))

## COBOL

```
IDENTIFICATION DIVISION.
PROGRAM-ID. Guess-With-Feedback.
DATA DIVISION.
LOCAL-STORAGE SECTION.
01 Seed PIC 9(8).
01 Random-Num PIC 99.
01 Guess PIC 99.
PROCEDURE DIVISION.
ACCEPT Seed FROM TIME
COMPUTE Random-Num =
FUNCTION REM(FUNCTION RANDOM(Seed) * 1000, 10) + 1
DISPLAY "Guess a number between 1 and 10:"
PERFORM FOREVER
ACCEPT Guess
IF Guess > Random-Num
DISPLAY "Your guess was too high."
ELSE IF Guess < Random-Num
DISPLAY "Your guess was too low."
ELSE
DISPLAY "Well guessed!"
EXIT PERFORM
END-PERFORM
GOBACK
.
```

## Common Lisp

(defun guess-the-number-feedback (&optional (min 1) (max 100)) (let ((num-guesses 0) (num (+ (random (1+ (- max min))) min)) (guess nil)) (format t "Try to guess a number from ~:d to ~:d!~%" min max) (loop do (format t "Guess? ") (incf num-guesses) (setf guess (read)) (format t "Your guess is ~[not a number.~;too small.~;too large.~;correct!~]~%" (cond ((not (numberp guess)) 0) ((< guess num) 1) ((> guess num) 2) ((= guess num) 3))) until (and (numberp guess) (= guess num))) (format t "You got the number correct on the ~:r guess!~%" num-guesses)))

Output:

```
CL-USER> (guess-the-number-feedback 1 1024)
Try to guess a number from 1 to 1,024!
Guess? 512
Your guess is too small.
Guess? 768
Your guess is too small.
Guess? 896
Your guess is too large.
Guess? 832
Your guess is too small.
Guess? 864
Your guess is too large.
Guess? 848
Your guess is too large.
Guess? 840
Your guess is too large.
Guess? 836
Your guess is correct!
You got the number correct on the eighth guess!
```

## D

{{trans|Python}}

import std.stdio, std.random, std.typecons, std.conv, std.string, std.range; void main() { immutable interval = tuple(1, 100); writefln("Guess my target number that is between " ~ "%d and %d (inclusive).\n", interval[]); immutable target = uniform!"[]"(interval[]); foreach (immutable i; sequence!q{n}) { writef("Your guess #%d: ", i + 1); immutable txt = stdin.readln.strip; Nullable!int answer; try { answer = txt.to!int; } catch (ConvException e) { writefln(" I don't understand your input '%s'", txt); continue; } if (answer < interval[0] || answer > interval[1]) { writeln(" Out of range!"); continue; } if (answer == target) { writeln(" Well guessed."); break; } writeln(answer < target ? " Too low." : " Too high."); } }

Sample game:

```
Guess my target number that is between 1 and 100 (inclusive).
Your guess #1: 100
Too high.
Your guess #2: 5
Too low.
Your guess #3: 522
Out of range!
Your guess #4: 50
Too low.
Your guess #5: 75
Too low.
Your guess #6: 80
Too low.
Your guess #7: 90
Too high.
Your guess #8: 85
Too high.
Your guess #9: 83
Well Guessed.
```

## DCL

```
$ rnd = f$extract( 21, 2, f$time() )
$ count = 0
$ loop:
$ inquire guess "guess what number between 0 and 99 inclusive I am thinking of"
$ guess = f$integer( guess )
$ if guess .lt. 0 .or. guess .gt. 99
$ then
$ write sys$output "out of range"
$ goto loop
$ endif
$ count = count + 1
$ if guess .lt. rnd then $ write sys$output "too small"
$ if guess .gt. rnd then $ write sys$output "too large"
$ if guess .ne. rnd then $ goto loop
$ write sys$output "it only took you ", count, " guesses"
```

{{out}}

```
$ @guess
guess what number between 0 and 99 inclusive I am thinking of: 50
too small
guess what number between 0 and 99 inclusive I am thinking of: 999
out of range
guess what number between 0 and 99 inclusive I am thinking of: 75
too small
guess what number between 0 and 99 inclusive I am thinking of: 82
too small
guess what number between 0 and 99 inclusive I am thinking of: 91
too small
guess what number between 0 and 99 inclusive I am thinking of: 96
too small
guess what number between 0 and 99 inclusive I am thinking of: 98
too large
guess what number between 0 and 99 inclusive I am thinking of: 97
it only took you 7 guesses
```

## Delphi

```
program GuessTheNumber;
{$APPTYPE CONSOLE}
uses
SysUtils,
Math;
const
// Set min/max limits
min: Integer = 1;
max: Integer = 10;
var
last,
val,
inp: Integer;
s: string;
// Initialise new game
procedure NewGame;
begin
// Make sure this number isn't the same as the last one
repeat
val := RandomRange(min,max);
until
val <> last;
// Save this number
last := val;
Writeln('Guess a number between ', min, ' and ', max, ' [Answer = ', val, ']');
end;
begin
// Initialise the random number generator with a random value
Randomize;
// Initialise last number
last := 0;
// Initialise user input
s := '';
// Start game
NewGame;
// Loop
repeat
// User input
Readln(s);
// Validate - checxk if input is a number
if TryStrToInt(s,inp) then
begin
// Is it the right number?
if (inp = val) then
begin
// Yes - request a new game
Writeln('Correct! Another go? Y/N');
Readln(s);
if SameText(s,'Y') then
// Start new game
NewGame
else
Exit;
end
else
// Input too low/high
if (inp < val) then
Writeln('Too low! Try again...')
else
if (inp > val) then
Writeln('Too high! Try again...');
end
else
// Input invalid
if not SameText(s,'bored') then
Writeln('Invalid input! Try again...');
until
SameText(s,'bored');
end.
```

## EasyLang

```
## EchoLisp
```lisp
;;(read <default-value> <prompt>) prompts the user with a default value using the browser dialog box.
;; we play sounds to make this look like an arcade game
(lib 'web) ; (play-sound) is defined in web.lib
(define (guess-feed (msg " 🔮 Enter a number in [0...100], -1 to stop.") (n (random 100)) (user 0))
(set! user (read user msg))
(play-sound 'ko)
(unless (eq? n user ) ; user is the last user answer
(guess-feed
(cond ;; adapt prompt according to condition
((not (integer? user)) "❌ Please, enter an integer")
(( < user 0) (error "🌵 - It was:" n)) ; exit to top level
((> n user) "Too low ...")
((< n user) "Too high ..."))
n user))
(play-sound 'ok )
" 🔮 Well played!! 🍒 🍇 🍓")
```

## Ela

```
open string datetime random core monad io
guess () = do
putStrLn "What's the upper bound?"
ub <- readAny
main ub
where main ub
| ub < 0 = "Bound should be greater than 0."
| else = do
putStrLn $ format "Guess a number from 1 to {0}" ub
dt <- datetime.now
guesser (rnd (milliseconds $ dt) 1 ub)
guesser v = do
x <- readAny
if x == v then
cont ()
else if x < v then
do putStrLn "Too small!"
guesser v
else
do putStrLn "Too big!"
guesser v
cont () = do
putStrLn "Correct! Do you wish to continue (Y/N)?"
ask ()
ask () = do
a <- readStr
if a == "y" || a == "Y" then
guess ()
else if a == "n" || a == "N" then
do putStrLn "Bye!"
else
do putStrLn "Say what?"
ask ()
guess () ::: IO
```

## Elena

ELENA 4.x :

```
import extensions;
public program()
{
int randomNumber := randomGenerator.eval(1,10);
console.printLine("I'm thinking of a number between 1 and 10. Can you guess it?");
bool numberCorrect := false;
until(numberCorrect)
{
console.print("Guess: ");
int userGuess := console.readLine().toInt();
if (randomNumber == userGuess)
{
numberCorrect := true;
console.printLine("Congrats!! You guessed right!")
}
else if (randomNumber < userGuess)
{
console.printLine("Your guess was too high")
}
else
{
console.printLine("Your guess was too low")
}
}
}
```

{{out}}

```
I'm thinking of a number between 1 and 10. Can you guess it?
Guess: 5
Your guess was too low
Guess: 8
Your guess was too high
Guess: 6
Congrats!! You guessed right!
```

## Elixir

{{works with|Elixir|1.2}}

defmodule GuessingGame do def play(lower, upper) do play(lower, upper, Enum.random(lower .. upper)) end defp play(lower, upper, number) do guess = Integer.parse(IO.gets "Guess a number (#{lower}-#{upper}): ") case guess do {^number, _} -> IO.puts "Well guessed!" {n, _} when n in lower..upper -> IO.puts if n > number, do: "Too high.", else: "Too low." play(lower, upper, number) _ -> IO.puts "Guess not in valid range." play(lower, upper, number) end end end GuessingGame.play(1, 100)

## Emacs Lisp

(let ((num (1+ (random 100)))) (princ "Guess the no: ") (loop (setq guess (read)) (cond ((not (numberp guess)) (print "Please enter a number")) ((eq guess num) (progn (princ-list "Guess was right! " num) (return))) ((> guess num) (print "Too High!")) ((< guess num) (print "Too low!"))) ) )

## Erlang

% Implemented by Arjun Sunel -module(guess_number). -export([main/0]). main() -> L = 1 , % Lower Limit U = 100, % Upper Limit io:fwrite("Guess my number between ~p and ", [L]), io:fwrite("and ~p until you get it right.\n", [U]), N = random:uniform(100), guess(N). guess(N) -> {ok, [K]} = io:fread("Guess the number : ","~d"), if K=:=N -> io:format("Well guessed!!\n"); true -> if K > N -> io:format("Your guess is too high.\n"); true -> io:format("Your guess is too low.\n") end, guess(N) end.

{{out}}

```
1> c(guess_number).
{ok,guess_number}
2> guess_number:main().
Guess my number between 1 and and 100 until you get it right.
Guess the number : 50
Your guess is too low.
Guess the number : 70
Your guess is too low.
Guess the number : 85
Your guess is too high.
Guess the number : 75
Your guess is too high.
Guess the number : 73
Well guessed!!
ok
```

## Euphoria

```
include get.e
constant lower_limit = 0, upper_limit = 100
integer number, guess
number = rand(upper_limit-lower_limit+1)+lower_limit
printf(1,"Guess the number between %d and %d: ", lower_limit & upper_limit)
while 1 do
guess = floor(prompt_number("", lower_limit & upper_limit))
if number = guess then
puts(1,"You guessed correctly!\n")
exit
elsif number < guess then
puts(1,"You guessed too high.\nTry again: ")
else
puts(1,"You guessed to low.\nTry again: ")
end if
end while
```

=={{header|F_Sharp|F#}}==

open System [<EntryPoint>] let main argv = let aim = let from = 1 let upto = 100 let rnd = System.Random() Console.WriteLine("Hi, you have to guess a number between {0} and {1}",from,upto) rnd.Next(from,upto) let mutable correct = false while not correct do let guess = Console.WriteLine("Please enter your guess:") match System.Int32.TryParse(Console.ReadLine()) with | true, number -> Some(number) | false,_ -> None match guess with | Some(number) -> match number with | number when number > aim -> Console.WriteLine("You guessed to high!") | number when number < aim -> Console.WriteLine("You guessed to low!") | _ -> Console.WriteLine("You guessed right!") correct <- true | None -> Console.WriteLine("Error: You didn't entered a parsable number!") 0

## Factor

```
USING:
formatting
fry
io
kernel
math math.parser math.ranges
prettyprint
random ;
IN: guessnumber
: game-step ( target -- ? )
readln string>number
[
2dup =
[ 2drop f "Correct!" ]
[ < "high" "low" ? "Guess too %s, try again." sprintf t swap ]
if
]
[ drop t "Invalid guess." ]
if* print flush ;
: main ( -- )
99 [1,b]
[ unparse "Number in range %s, your guess?\n" printf flush ]
[ random '[ _ game-step ] loop ]
bi ;
```

## Fantom

```
class Main
{
public static Void main ()
{
Int lowerLimit := 1
Int higherLimit := 100
Int target := (lowerLimit..higherLimit).random
Int guess
while (guess != target)
{
echo ("Enter a guess: ")
try
{
// read in a line of input, and try to interpret as an Int
guess = Env.cur.in.readLine.trim.toInt
if (guess == target)
{
echo ("Well guessed!")
}
else if (guess < target)
{
echo ("Failed - your guess is too small")
}
else // if (guess > target)
{
echo ("Failed - your guess is too large")
}
}
catch (Err e)
{
echo ("Your guess must be an integer")
}
}
}
}
```

Sample game:

```
Enter a guess:
50
Failed - your guess is too small
Enter a guess:
75
Failed - your guess is too large
Enter a guess:
67
Failed - your guess is too large
Enter a guess:
60
Failed - your guess is too large
Enter a guess:
55
Failed - your guess is too large
Enter a guess:
53
Failed - your guess is too small
Enter a guess:
54
Well guessed!
```

## Fortran

{{works with|Fortran|95 and later}}

```
program Guess_a_number
implicit none
integer, parameter :: limit = 100
integer :: guess, number
real :: rnum
write(*, "(a, i0, a)") "I have chosen a number between 1 and ", limit, &
" and you have to try to guess it."
write(*, "(a/)") "I will score your guess by indicating whether it is higher, lower or the same as that number"
call random_seed
call random_number(rnum)
number = rnum * limit + 1
do
write(*, "(a)", advance="no") "Enter quess: "
read*, guess
if(guess < number) then
write(*, "(a/)") "That is lower"
else if(guess > number) then
write(*, "(a/)") "That is higher"
else
write(*, "(a)") "That is correct"
exit
end if
end do
end program
```

Output

```
I have chosen a number bewteen 1 and 100 and you have to try to guess it.
I will score your guess by indicating whether it is higher, lower or the same as that number.
Enter guess: 50
That is lower
Enter guess: 75
That is higher
Enter guess: 62
That is higher
Enter guess: 57
That is correct
```

## FreeBASIC

```
' FB 1.05.0 Win64
Randomize
Dim n As Integer = Int(Rnd * 20) + 1
Dim guess As Integer
Print "Guess which number I've chosen in the range 1 to 20"
Print
Do
Input " Your guess : "; guess
If guess > n AndAlso guess <= 20 Then
Print "Your guess is higher than the chosen number, try again "
ElseIf guess = n Then
Print "Correct, well guessed!"
Exit Do
ElseIf guess < n AndAlso guess >= 1 Then
Print "Your guess is lower than the chosen number, try again"
Else
Print "Your guess is inappropriate, try again"
End If
Loop
End
```

Sample input/output {{out}}

```
Your guess : ? 14
Your guess is lower than the chosen number, try again
Your guess : ? 17
Your guess is lower than the chosen number, try again
Your guess : ? 18
Your guess is lower than the chosen number, try again
Your guess : ? 19
Correct, well guessed!
```

## Genie

```
[indent=4]
/*
Number guessing with feedback, in Genie
from https://wiki.gnome.org/Projects/Genie/AdvancedSample
valac numberGuessing.gs
./numberGuessing
*/
class NumberGuessing
prop min:int
prop max:int
construct(m:int, n:int)
self.min = m
self.max = n
def start()
try_count:int = 0
number:int = Random.int_range(min, max)
stdout.printf("Welcome to Number Guessing!\n\n")
stdout.printf("I have thought up a number between %d and %d\n", min, max)
stdout.printf("which you have to guess. I will give hints as we go.\n\n")
while true
stdout.printf("Try #%d, ", ++try_count)
stdout.printf("please enter a number between %d and %d: ", min, max)
line:string? = stdin.read_line()
if line is null
stdout.printf("bailing...\n")
break
input:int64 = 0
unparsed:string = ""
converted:bool = int64.try_parse(line, out input, out unparsed)
if not converted or line is unparsed
stdout.printf("Sorry, input seems invalid\n")
continue
guess:int = (int)input
if number is guess
stdout.printf("Congratulations! You win.\n")
break
else
stdout.printf("Try again. The number in mind is %s than %d.\n",
number > guess ? "greater" : "less", guess)
init
var game = new NumberGuessing(1, 100)
game.start()
```

{{out}}

```
prompt$ valac numberGuessing.gs
prompt$ ./numberGuessing
Welcome to Number Guessing!
I have thought up a number between 1 and 100
which you have to guess. I will give hints as we go.
Try #1, please enter a number between 1 and 100: 50
Try again. The number in mind is greater than 50.
Try #2, please enter a number between 1 and 100: abc
Sorry, input seems invalid
Try #3, please enter a number between 1 and 100: 75
Try again. The number in mind is greater than 75.
Try #4, please enter a number between 1 and 100: 88
Try again. The number in mind is less than 88.
Try #5, please enter a number between 1 and 100: 81
Try again. The number in mind is greater than 81.
Try #6, please enter a number between 1 and 100: 84
Try again. The number in mind is less than 84.
Try #7, please enter a number between 1 and 100: 82
Try again. The number in mind is greater than 82.
Try #8, please enter a number between 1 and 100: 83
Congratulations! You win.
prompt$ ./numberGuessing
Welcome to Number Guessing!
I have thought up a number between 1 and 100
which you have to guess. I will give hints as we go.
Try #1, please enter a number between 1 and 100: 50
Try again. The number in mind is greater than 50.
Try #2, please enter a number between 1 and 100: bailing...
```

## Go

package main import ( "fmt" "math/rand" "time" ) const lower, upper = 1, 100 func main() { fmt.Printf("Guess integer number from %d to %d: ", lower, upper) rand.Seed(time.Now().Unix()) n := rand.Intn(upper-lower+1) + lower for guess := n; ; { switch _, err := fmt.Scan(&guess); { case err != nil: fmt.Println("\n", err, "So, bye.") return case guess < n: fmt.Print("Too low. Try again: ") case guess > n: fmt.Print("Too high. Try again: ") default: fmt.Println("Well guessed!") return } } }

## Groovy

Based on the Java implementation

def rand = new Random() // java.util.Random def range = 1..100 // Range (inclusive) def number = rand.nextInt(range.size()) + range.from // get a random number in the range println "The number is in ${range.toString()}" // print the range def guess while (guess != number) { // keep running until correct guess try { print 'Guess the number: ' guess = System.in.newReader().readLine() as int // read the guess in as int switch (guess) { // check the guess against number case { it < number }: println 'Your guess is too low'; break case { it > number }: println 'Your guess is too high'; break default: println 'Your guess is spot on!'; break } } catch (NumberFormatException ignored) { // catches all input that is not a number println 'Please enter a number!' } }

Example:

```
## Haskell
```haskell
import Control.Monad
import System.Random
-- Repeat the action until the predicate is true.
until_ act pred = act >>= pred >>= flip unless (until_ act pred)
answerIs ans guess =
case compare ans guess of
LT -> putStrLn "Too high. Guess again." >> return False
EQ -> putStrLn "You got it!" >> return True
GT -> putStrLn "Too low. Guess again." >> return False
-- Repeatedly read until the input *starts* with a number. (Since
-- we use "reads" we allow garbage to follow it, though.)
ask = do line <- getLine
case reads line of
((num,_):_) -> return num
otherwise -> putStrLn "Please enter a number." >> ask
main = do
ans <- randomRIO (1,100) :: IO Int
putStrLn "Try to guess my secret number between 1 and 100."
ask `until_` answerIs ans
```

## HolyC

```
U8 n, *g;
U8 min = 1, max = 100;
n = min + RandU16 % max;
Print("Guess the number between %d and %d: ", min, max);
while(1) {
g = GetStr;
if (Str2I64(g) == n) {
Print("You guessed correctly!\n");
break;
}
if (Str2I64(g) < n)
Print("Your guess was too low.\nTry again: ");
if (Str2I64(g) > n)
Print("Your guess was too high.\nTry again: ");
}
```

=={{header|Icon}} and {{header|Unicon}}==

```
procedure main()
smallest := 5
highest := 25
n := smallest-1 + ?(1+highest-smallest)
repeat {
writes("Pick a number from ", smallest, " through ", highest, ": ")
guess := read ()
if n = numeric(guess)
then {
write ("Well guessed!")
exit ()
}
else if n < numeric(guess)
then write ("Your guess is too high")
else if n > numeric(guess)
then write ("Your guess is too low")
else write ("Did you enter a number?")
}
end
```

Output:

```
$ ./guess-feedback
Pick a number from 5 through 25: 10
Your guess is too low
Pick a number from 5 through 25: 16
Your guess is too low
Pick a number from 5 through 25: 20
Your guess is too low
Pick a number from 5 through 25: 23
Your guess is too high
Pick a number from 5 through 25: 22
Well guessed!
```

## J

```
require 'misc'
game=: verb define
assert. y -: 1 >. <.{.y
n=: 1 + ?y
smoutput 'Guess my integer, which is bounded by 1 and ',":y
whilst. -. x -: n do.
x=. {. 0 ". prompt 'Guess: '
if. 0 -: x do. 'Giving up.' return. end.
smoutput (*x-n){::'You win.';'Too high.';'Too low.'
end.
)
```

Note: in computational contexts, J programmers typically avoid loops. However, in contexts which involve progressive input and output and where event handlers are too powerful (too complicated), loops are probably best practice.

Example use:

```
## Java
```Java
import java.util.Random;
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
Random random = new Random();
long from = 1;
long to = 100;
int randomNumber = random.nextInt(to - from + 1) + from;
int guessedNumber = 0;
System.out.printf("The number is between %d and %d.\n", from, to);
do
{
System.out.print("Guess what the number is: ");
guessedNumber = scan.nextInt();
if (guessedNumber > randomNumber)
System.out.println("Your guess is too high!");
else if (guessedNumber < randomNumber)
System.out.println("Your guess is too low!");
else
System.out.println("You got it!");
} while (guessedNumber != randomNumber);
}
}
```

Demonstration:

```
The number is between 1 and 100.
Guess what the number is: 50
Your guess is too high!
Guess what the number is: 25
Your guess is too high!
Guess what the number is: 17
Your guess is too high!
Guess what the number is: 10
Your guess is too high!
Guess what the number is: 5
Your guess is too low!
Guess what the number is: 7
You got it!
```

## JavaScript

```
<form id="guessNumber">
<input type="text" name="guess">
<input type="submit" value="Submit Guess">
</form>
<p id="output"></p>
<script type="text/javascript">
```

var number = Math.ceil(Math.random() * 100); function verify() { var guess = Number(this.elements.guess.value), output = document.getElementById('output'); if (isNaN(guess)) { output.innerHTML = 'Enter a number.'; } else if (number === guess) { output.innerHTML = 'You guessed right!'; } else if (guess > 100) { output.innerHTML = 'Your guess is out of the 1 to 100 range.'; } else if (guess > number) { output.innerHTML = 'Your guess is too high.'; } else if (guess < number) { output.innerHTML = 'Your guess is too low.'; } return false; } document.getElementById('guessNumber').onsubmit = verify;

```
### Spidermonkey Version
```javascript
#!/usr/bin/env js
function main() {
guessTheNumber(1, 100);
}
function guessTheNumber(low, high) {
var num = randOnRange(low, high);
var guessCount = 0;
function checkGuess(n) {
if (n < low || n > high) {
print('That number is not between ' + low + ' and ' + high + '!');
return false;
}
if (n == num) {
print('You got it in ' + String(guessCount) + ' tries.');
return true;
}
if (n < num) {
print('Too low.');
} else {
print('Too high.');
}
return false;
}
print('I have picked a number between ' + low + ' and ' + high + '. Try to guess it!');
while (true) {
guessCount++;
putstr(" Your guess: ");
var n = parseInt(readline());
if (checkGuess(n)) break;
}
}
function randOnRange(low, high) {
var r = Math.random();
return Math.floor(r * (high - low + 1)) + low;
}
main();
```

Example session: I have picked a number between 1 and 100. Try to guess it! Your guess: 50 Too low. Your guess: 75 Too high. Your guess: 62 Too high. Your guess: 56 Too low. Your guess: 58 Too high. Your guess: 57 You got it in 6 tries.

## Julia

{{works with|Julia|0.6}}

function guesswithfeedback(n::Integer) number = rand(1:n) print("I choose a number between 1 and $n\nYour guess? ") while (guess = readline()) != dec(number) if all(isdigit, guess) print("Too ", parse(Int, guess) < number ? "small" : "big") else print("Enter an integer please") end print(", new guess? ") end println("You guessed right!") end guesswithfeedback(10)

{{out}}

```
I choose a number between 1 and 10
Your guess? 11
Too big, new guess? 1
Too small, new guess? 5
Too small, new guess? 6
Too small, new guess? 7
You guessed right!
```

## Kotlin

// version 1.1.2 fun main(args: Array<String>) { val rand = java.util.Random() val n = 1 + rand.nextInt(20) var guess :Int println("Guess which number I've chosen in the range 1 to 20\n") while (true) { print(" Your guess : ") guess = readLine()!!.toInt() when (guess) { n -> { println("Correct, well guessed!") ; return } in n + 1 .. 20 -> println("Your guess is higher than the chosen number, try again") in 1 .. n - 1 -> println("Your guess is lower than the chosen number, try again") else -> println("Your guess is inappropriate, try again") } } }

Sample inout/output {{out}}

```
Guess which number I've chosen in the range 1 to 20
Your guess : 10
Your guess is higher than the chosen number, try again
Your guess : 5
Your guess is higher than the chosen number, try again
Your guess : 3
Your guess is higher than the chosen number, try again
Your guess : 2
Correct, well guessed!
```

## Lambdatalk

```
{def game
{def game.rec // recursive part
{lambda {:n :l :h}
{let { {:n :n} {:l :l} {:h :h} // :n, :l, :h redefined
{:g {round {/ {+ :l :h} 2}}}} // :g is the middle
{if {< :g :n}
then {br}:g too low!
{game.rec :n {+ :g 1} :h} // do it again higher
else {if {> :g :n}
then {br}:g too high!
{game.rec :n :l {- :g 1}} // do it again lower
else {br}{b :g Got it!} }} }}} // bingo!
{lambda {:n}
{let { {:n :n} // :n redefined
{:N {floor {* :n {random}}}}} // compute a random number
Find {b :N} between 0 and :n {game.rec :N 0 :n}
}}}
{game {pow 2 32}} // 2**32 = 4294967296
```

Sample inout/output {{out}}

```
Find 2037303041 between 0 and 4294967296
2147483648 too high!
1073741824 too low!
1610612736 too low!
1879048192 too low!
2013265920 too low!
2080374784 too high!
2046820352 too high!
2030043136 too low!
2038431744 too high!
2034237440 too low!
2036334592 too low!
2037383168 too high!
2036858880 too low!
2037121024 too low!
2037252096 too low!
2037317632 too high!
2037284864 too low!
2037301248 too low!
2037309440 too high!
2037305344 too high!
2037303296 too high!
2037302272 too low!
2037302784 too low!
2037303040 too low!
2037303168 too high!
2037303104 too high!
2037303072 too high!
2037303056 too high!
2037303048 too high!
2037303044 too high!
2037303042 too high!
2037303041 Got it!
```

## Lasso

```
#!/usr/bin/lasso9
local(
lower = integer_random(10, 1),
higher = integer_random(100, 20),
number = integer_random(#higher, #lower),
status = false,
guess
)
// prompt for a number
stdout('Guess a number: ')
while(not #status) => {
#guess = null
// the following bits wait until the terminal gives you back a line of input
while(not #guess or #guess -> size == 0) => {
#guess = file_stdin -> readSomeBytes(1024, 1000)
}
#guess = integer(#guess)
if(not (range(#guess, #lower, #higher) == #guess)) => {
stdout('Input not of correct type or range. Guess a number: ')
else(#guess > #number)
stdout('That was to high, try again! ')
else(#guess < #number)
stdout('That was to low, try again! ')
else(#guess == #number)
stdout('Well guessed!')
#status = true
}
}
```

With range value 8 and 73. Correct number 13

Output:

```
Guess a number: 70
That was to high, try again! 35
That was to high, try again! 14
That was to high, try again! 7
Input not of correct type or range. Guess a number: 10
That was to low, try again! 12
That was to low, try again! 13
Well guessed!
```

## LFE

(defmodule guessing-game (export (main 0))) (defun get-player-guess () (let (((tuple 'ok (list guessed)) (: io fread '"Guess number: " '"~d"))) guessed)) (defun check-guess (answer guessed) (cond ((== answer guessed) (: io format '"Well-guessed!!~n")) ((/= answer guessed) (if (> answer guessed) (: io format '"Your guess is too low.~n")) (if (< answer guessed) (: io format '"Your guess is too high.~n")) (check-guess answer (get-player-guess))))) (defun main () (: io format '"Guess the number I have chosen, between 1 and 10.~n") (check-guess (: random uniform 10) (get-player-guess)))

From the LFE REPL (assuming the above code was saved in the file "guessing-game.lfe"):

> (slurp '"guessing-game.lfe") #(ok guessing-game) > (main) Guess the number I have chosen, between 1 and 10. Guess number: 10 Your guess is too high. Guess number: 1 Your guess is too low. Guess number: 5 Your guess is too low. Guess number: 7 Well-guessed!! ok >

## Liberty BASIC

```
[start]
target = int( rnd( 1) * 100) +1
while 1
do
input "Guess a whole number between 1 and 100. To finish, type 'exit' "; b$
if b$ ="exit" then print "Thank you for playing!": end
c = val( b$)
ok =( c =int( c)) and ( c >=1) and ( c <=100)
if ok =0 then notice "Invalid data. Integers 1 to 100 only."
loop until ok <>0
if c =target then print " You guessed correctly.": print: goto [start]
if c <target then print " Your guess was too low."
if c >target then print " Your guess was too high."
wend
```

## LiveCode

```
command guessTheNumber lowN highN
local tNumber, tguess, tmin, tmax
if lowN is empty or lowN < 1 then
put 1 into tmin
else
put lowN into tmin
end if
if highN is empty then
put 10 into tmax
else
put highN into tmax
end if
put random(tmax - tmin + 1) + tmin - 1 into tNumber
repeat until tguess is tNumber
ask question "Please enter a number between" && tmin && "and" && tmax titled "Guess the number"
if it is not empty then
put it into tguess
if tguess is tNumber then
answer "Well guessed!"
else if tguess < tNumber then
answer "too low"
else
answer "too high"
end if
else
exit repeat
end if
end repeat
end guessTheNumber
```

Test

```
command testGuessNumber
guessTheNumber --defaults to 1-10
guessTheNumber 9,12
end testGuessNumber
```

## Locomotive Basic

```
10 CLS:RANDOMIZE TIME
20 PRINT "Please specify lower and upper limits":guess=0
30 INPUT " (must be positive integers) :", first, last
40 IF first<1 OR last<1 THEN 20
50 num=INT(RND*(last-first+1)+first)
60 WHILE num<>guess
70 INPUT "Your guess? ", guess
80 IF guess<num THEN PRINT "too small!"
90 IF guess>num THEN PRINT "too large!"
100 WEND
110 INPUT "That's correct! Another game (y/n)? ", yn$
120 IF yn$="y" THEN 20
```

Output:

[[File:Guess the number cpc.png]]

## Logo

{{trans|UNIX Shell}}

```
to guess [:max 100]
local "number
make "number random :max
local "guesses
make "guesses 0
local "guess
forever [
(type [Guess my number! \(range 1 -\ ] :max "\):\ )
make "guess first readlist
ifelse (or (not numberp :guess) (lessp :guess 1) (greaterp :guess :max)) [
print sentence [Guess must be a number between 1 and] (word :max ".)
] [
make "guesses (:guesses + 1)
ifelse lessp :guess :number [
print [Too low!]
] [ifelse equalp :guess :number [
(print [You got it in] :guesses "guesses!)
stop
] [
print [Too high!]
]]
]
]
end
```

Sample run:

```
? guess
Guess my number! (range 1 - 100): 50
Too low!
Guess my number! (range 1 - 100): 75
Too high!
Guess my number! (range 1 - 100): 67
Too low!
Guess my number! (range 1 - 100): 71
Too high!
Guess my number! (range 1 - 100): 69
You got it in 5 guesses!
```

## Lua

math.randomseed(os.time()) me_win=false my_number=math.random(1,10) while me_win==false do print "Guess my number from 1 to 10:" your_number = io.stdin:read'*l' if type(tonumber(your_number))=="number" then your_number=tonumber(your_number) if your_number>10 or your_number<1 then print "Your number was not between 1 and 10, try again." elseif your_number>my_number then print "Your number is greater than mine, try again." elseif your_number<my_number then print "Your number is smaller than mine, try again." elseif your_number==my_number then print "That was correct." me_win=true end else print "Your input was not a number, try again." end end

```
Output:
Guess my number from 1 to 10:
4
Your number is smaller than mine, try again.
Guess my number from 1 to 10:
8
Your number is greater than mine, try again.
Guess my number from 1 to 10:
5
That was correct.
```

## M2000 Interpreter

{{trans|BASIC256}}

```
Module GuessNumber {
Read Min, Max
chosen = Random(Min, Max)
print "guess a whole number between ";Min;" and ";Max
do {
\\ we use guess so Input get integer value
\\ if we press enter without a number we get error
do {
\\ if we get error then we change line, checking the cursor position
If Pos>0 then Print
Try ok {
input "Enter your number " , guess%
}
} until ok
Select Case guess%
case min to chosen-1
print "Sorry, your number was too low"
case chosen+1 to max
print "Sorry, your number was too high"
case chosen
print "Well guessed!"
else case
print "That was an invalid number"
end select
} until guess% = chosen
}
GuessNumber 5, 15
```

{{out}} same as BASIC256

## Maple

```
GuessANumber := proc(low, high)
local number, input;
randomize():
printf( "Guess a number between %d and %d:\n:> ", low, high );
number := rand(low..high)();
do
input := parse(readline());
if input > number then
printf("Too high, try again!\n:> ");
elif input < number then
printf("Too low, try again!\n:> ");
else
printf("Well guessed! The answer was %d.\n", number);
break;
end if;
end do:
end proc:
```

```
GuessANumber(2,5);
```

=={{header|Mathematica}} / {{header|Wolfram Language}}==

```
guessnumber[min_, max_] :=
Module[{number = RandomInteger[{min, max}], guess},
While[guess =!= number,
guess = Input[
If[guess > number, "Too high.Guess again.",
"Too low.Guess again.",
"Guess a number between " <> ToString@min <> " and " <>
ToString@max <> "."]]];
CreateDialog[{"Well guessed!", DefaultButton[]}]];
guessnumber[1, 10]
```

=={{header|MATLAB}} / {{header|Octave}}== {{untested|Octave}} Tested in MATLAB. Untested in Octave.

function guess_a_number(low, high) if nargin < 1 || ~isnumeric(low) || length(low) > 1 || isnan(low) low = 1; end; if nargin < 2 || ~isnumeric(high) || length(high) > 1 || isnan(high) high = low+9; elseif low > high [low, high] = deal(high, low); end n = floor(rand(1)*(high-low+1))+low; gs = input(sprintf('Guess an integer between %i and %i (inclusive): ', low, high), 's'); while gs % No guess quits the game g = str2double(gs); if length(g) > 1 || isnan(g) || g < low || g > high gs = input('Invalid input, guess again: ', 's'); elseif g < n gs = input('Too low, guess again: ', 's'); elseif g > n gs = input('Too high, guess again: ', 's'); else disp('Good job, you win!') gs = ''; end end

## MAXScript

```
Range = [1,100]
randomNumber = (random Range.x Range.y) as integer
clearListener()
while true do
(
userVal = getKBValue prompt:("Enter a number between "+(range[1] as integer) as string+" and "+(range[2] as integer) as string+": ")
if userVal == randomNumber do (format "\nWell guessed!\n"; exit with OK)
case of
(
(classOf userVal != classof randomNumber): (format "\nBad number!\n")
(userVal > Range[2] or userVal < Range[1]): (format "\nNumber out of range\n")
(userVal > randomNumber): (format "\nToo high!\n")
(userVal < randomNumber): (format "\nToo low!\n")
)
)
```

Output:

```
Enter a number between 1 and 100: 5
Too low!
Enter a number between 1 and 100: 9.0
Bad number!
Enter a number between 1 and 100: 145
Number out of range
Enter a number between 1 and 100: 95
Too low!
Enter a number between 1 and 100: 99
Too high!
Enter a number between 1 and 100: 97
Well guessed!
OK
```

## Mirah

```
def getInput:int
s = System.console.readLine()
Integer.parseInt(s)
end
number = int(Math.random() * 10 + 1)
puts "Guess the number between 1 and 10"
guessed = false
while !guessed do
begin
userNumber = getInput
if userNumber == number
guessed = true
puts "You guessed it."
elsif userNumber > number
puts "Too high."
else
puts "Too low."
end
rescue NumberFormatException => e
puts "Please enter an integer."
end
end
```

=={{header|Modula-2}}==

```
MODULE guessf;
IMPORT InOut, Random, NumConv, Strings;
VAR number, guess : CARDINAL;
input : Strings.String;
OK, Done : BOOLEAN;
BEGIN
number := Random.nr (1000);
InOut.WriteString ("I have chosen a number below 1000; please try to guess it.");
InOut.WriteLn;
REPEAT
REPEAT
InOut.WriteString ("Enter your guess : "); InOut.WriteBf;
InOut.ReadString (input);
NumConv.Str2Num (guess, 10, input, OK);
IF NOT OK THEN
InOut.WriteString (input);
InOut.WriteString (" is not a valid number...");
InOut.WriteLn
END
UNTIL OK;
InOut.WriteString ("Your guess is ");
IF number = guess THEN
Done := TRUE;
InOut.WriteString ("spot on!")
ELSE
Done := FALSE;
IF guess > number THEN
InOut.WriteString ("too high.")
ELSE
InOut.WriteString ("too low.")
END
END;
InOut.WriteLn
UNTIL Done;
InOut.WriteString ("Thank you for playing; have a nice day!");
InOut.WriteLn
END guessf.
```

```
I have chosen a number below 1000; please try to guess it.
Enter your guess : 500
Your guess is too low.
Enter your guess : 750
Your guess is too high.
Enter your guess : 625
Your guess is too high.
Enter your guess : kwak
kwak is not a valid number...
Enter your guess : 531
Your guess is spot on!
Thank you for playing; have a nice day!
```

## Nemerle

```
using System;
using System.Console;
module GuessHints
{
Main() : void
{
def rand = Random();
def secret = rand.Next(1, 101);
mutable guess = 0;
def GetGuess() : int {Int32.Parse(ReadLine())}
WriteLine("Guess a number between 1 and 100:");
do
{
guess = GetGuess();
match(guess.CompareTo(secret))
{
|(-1) => WriteLine("Too low! Guess again:")
|1 => WriteLine("Too high! Guess again:")
|0 => WriteLine("Well guessed!")
}
} while (guess != secret)
}
}
```

## NetRexx

```
/* NetRexx */
options replace format comments java crossref symbols nobinary
parse arg lo hi .
if lo = '' | lo = '.' then lo = 1
if hi = '' | hi = '.' then hi = 100
if lo > hi then parse (hi lo) lo hi -- make sure lo is < hi
rg = Random()
tries = 0
guessThis = rg.nextInt(hi - lo) + lo
say
say 'Rules: Guess a number between' lo 'and' hi
say ' Use QUIT or . to stop the game'
say ' Use TELL to get the game to tell you the answer.'
say
say 'Starting...'
say
loop label g_ forever
say 'Try guessing a number between' lo 'and' hi
parse ask guess .
select
when guess.upper = 'QUIT' | guess = '.' then do
say 'You asked to leave the game. Goodbye...'
leave g_
end
when guess.upper = 'TELL' | guess = '.' then do
say 'The number you were looking for is' guessThis
end
when \guess.datatype('w') then do
say guess 'is not a whole number. Try again.'
end
when guess = guessThis then do
tries = tries + 1
say 'Well guessed!' guess 'is the correct number.'
say 'It took you' tries 'tries.'
leave g_
end
when guess < lo then do
tries = tries + 1
say guess 'is below the lower limit of' lo
end
when guess > hi then do
tries = tries + 1
say guess 'is above the upper limit of' hi
end
when guess < guessThis then do
tries = tries + 1
say guess 'is too low. Try again.'
end
when guess > guessThis then do
tries = tries + 1
say guess 'is too high. Try again.'
end
otherwise do
say guess 'is an unexpected value.'
end
end
end g_
return
```

## NewLISP

```
; guess-number-feedback.lsp
; oofoe 2012-01-19
; http://rosettacode.org/wiki/Guess_the_number/With_feedback
(seed (time-of-day)) ; Initialize random number generator from clock.
(setq low -5
high 62
number (+ low (rand (- high low)))
found nil
)
(print "I'm thinking of a number between " low " and " high ".")
(while (not found)
(print " What's your guess? ")
(setq guess (int (read-line) 'bad))
(print (cond ((= 'bad guess) "That's not a number! Try again!")
((or (< guess low) (> guess high))
(string "My number is between " low
" and " high ". Try again!"))
((< number guess) "Try a little lower...")
((> number guess) "Maybe a bit higher...")
((= number guess) (setq found true) "Exactly right!")))
)
(println "\nWell guessed! Congratulations!")
(exit)
```

Sample output:

```
I'm thinking of a number between -5 and 62. What's your guess? No idea.
That's not a number! Try again! What's your guess? 99
My number is between -5 and 62. Try again! What's your guess? -5
Maybe a bit higher... What's your guess? 30
Try a little lower... What's your guess? 15
Try a little lower... What's your guess? 0
Maybe a bit higher... What's your guess? 3
Try a little lower... What's your guess? 1
Exactly right!
Well guessed! Congratulations!
```

## Nim

import random, rdstdin, strutils randomize() let iRange = 1..100 echo "Guess my target number that is between ", iRange.a, " and ", iRange.b, " (inclusive)." let target = random(iRange) var answer, i = 0 while answer != target: inc i let txt = readLineFromStdin("Your guess " & $i & ": ") try: answer = parseInt(txt) except ValueError: echo " I don't understand your input of '", txt, "'" continue if answer < iRange.a or answer > iRange.b: echo " Out of range!" elif answer < target: echo " Too low." elif answer > target: echo " Too high." else: echo " Ye-Haw!!" echo "Thanks for playing."

Output:

```
Guess my target number that is between 1 and 100 (inclusive).
Your guess 1: 50
Too high.
Your guess 2: 300
Out of range!
Your guess 3: -10
Out of range!
Your guess 4: foo
I don't understand your input of 'foo'
Your guess 5: 35
Too low.
Your guess 6: 42
Too high.
Your guess 7: 38
Too low.
Your guess 8: 40
Too low.
Your guess 9: 41
Ye-Haw!!
Thanks for playing.
```

## Objeck

```
use IO;
bundle Default {
class GuessNumber {
function : Main(args : String[]) ~ Nil {
Guess();
}
function : native : Guess() ~ Nil {
done := false;
"Guess the number which is between 1 and 10 or 'n' to quite: "->PrintLine();
rand_num := (Float->Random() * 10.0)->As(Int) + 1;
while(done = false) {
guess := Console->ReadString();
number := guess->ToInt();
if(number <> 0) {
if(number <> rand_num) {
Console->Print("Your guess was too ")
->Print(number < rand_num ? "low" : "high")
->Print(".\nGuess again: ");
}
else {
"Hurray! You guessed correctly!"->PrintLine();
done := true;
};
}
else {
if(guess->StartsWith("q") | guess->StartsWith("Q")) {
done := true;
};
};
};
}
}
}
```

## OCaml

let rec _read_int() = try read_int() with _ -> print_endline "Please give a cardinal numbers."; (* TODO: what is the correct word? cipher, digit, figure or numeral? *) _read_int() ;; let () = print_endline "Please give a set limits (two integers):"; let a = _read_int() and b = _read_int() in let a, b = if a < b then (a, b) else (b, a) in Random.self_init(); let target = a + Random.int (b - a) in Printf.printf "I have choosen a number between %d and %d\n%!" a b; print_endline "Please guess it!"; let rec loop () = let guess = _read_int() in if guess = target then begin print_endline "The guess was equal to the target.\nCongratulation!"; exit 0 end; if guess < a || guess > b then print_endline "The input was inappropriate." else if guess > target then print_endline "The guess was higher than the target." else if guess < target then print_endline "The guess was less than the target."; loop () in loop ()

Playing the game:

```
$ ocaml inapropriate.ml
Please give a set limits (two integers):
3
7
I have choosen a number between 3 and 7
Please guess it!
6
The guess was higher than the target.
7
The guess was higher than the target.
8
The input was inappropriate.
3
The guess was less than the target.
4
The guess was equal to the target.
Congratulation!
```

```
$ ocaml inapropriate.ml
Please give a set limits (two integers):
2
6
I have choosen a number between 2 and 6
Please guess it!
three
Please give a cardinal numbers.
```

## Octave

```
function guess_a_number(low,high)
% Guess a number (with feedback)
% http://rosettacode.org/wiki/Guess_the_number/With_feedback
if nargin<1,
low=1;
end;
if nargin<2,
high=10;
end;
n = floor(rand(1)*(high-low+1))+low;
[guess,state] = str2num(input(sprintf('Guess a number between %i and %i: ',low,high),'s'));
while (~state || guess~=n)
if guess < n,
g = input('to low, guess again: ','s');
[guess, state] = str2num(g);
elseif guess > n,
g = input('to high, guess again: ','s');
[guess, state] = str2num(g);
end;
while ~state
g = input('invalid input, guess again: ','s');
[guess, state] = str2num(g);
end
end
disp('Well guessed!')
```

## Oforth

```
import: console
: guessNumber(a, b)
| n g |
b a - rand a + 1- ->n
begin
"Guess a number between" . a . "and" . b . ":" .
while(System.Console askln asInteger dup -> g isNull) [ "Not a number " println ]
g n == ifTrue: [ "You found it !" .cr return ]
g n < ifTrue: [ "Less" ] else: [ "Greater" ] . "than the target" .cr
again ;
```

## Ol

```
(import (otus random!))
(define from 0)
(define to 100)
(define number (+ from (rand! (+ from to 1))))
(let loop ()
(for-each display `("Pick a number from " ,from " through " ,to ": "))
(let ((guess (read)))
(cond
((not (number? guess))
(print "Not a number!")
(loop))
((or (< guess from)
(< to guess))
(print "Out of range!")
(loop))
((< guess number)
(print "Too low!")
(loop))
((> guess number)
(print "Too high!")
(loop))
((= guess number)
(print "Well guessed!")))))
```

## PARI/GP

```
guess_the_number(N=10)={
a=random(N);
print("guess the number between 0 and "N);
for(x=1,N,
if(x>1,
if(b>a,
print("guess again lower")
,
print("guess again higher")
);
b=input();
if(b==a,break())
);
print("You guessed it correctly")
};
```

## ooRexx

While the program for REXX works perfectly well with ooRexx, here is a version written in an alternate (my) style. Select instead of a series of If's simple comparison instead of strict different indentations. entering ? shows the number we are looking for This program should, of course, also work with all other Rexxes

```
/*REXX program that plays the guessing (the number) game. */
low=1 /*lower range for the guessing game.*/
high=100 /*upper range for the guessing game.*/
try=0 /*number of valid attempts. */
r=random(1,100) /*get a random number (low-->high). */
do forever
say
say "guess the number, it's between" low 'and' high '(inclusive)',
'or enter quit to end the game.'
say
pull g
say
g=space(g)
Select
When g='' then iterate
When g='QUIT' then exit
When g='?' then Do
Say 'The number you are looking for is' r
Iterate
End
When \datatype(g,'W') then do
call ser g "isn't a valid number"
iterate
end
When g<low then do
call ser g 'is below the lower limit of' low
iterate
end
When g>high then do
call ser g 'is above the higher limit of' high
iterate
end
When g=r then do
try=try+1
Leave
End
Otherwise Do
try=try+1
if g>r then what='high'
else what='low'
say 'your guess of' g 'is too' what'.'
end
end
end
say
tries='tries'
if try=1 then
say 'Congratulations!, you guessed the number in 1 try. Did you cheat?'
Else
say 'Congratulations!, you guessed the number in' try 'tries.'
say
exit
ser: say; say '*** error ! ***'; say arg(1); say; return
```

## Pascal

See [[Guess_the_number#Delphi | Delphi]]

## Perl

sub prompt { my $prompt = shift; while (1) { print "\n", $prompt, ": "; # type ^D, q, quit, quagmire, etc to quit defined($_ = <STDIN>) and !/^\s*q/ or exit; return $_ if /^\s*\d+\s*$/s; $prompt = "Please give a non-negative integer"; } } my $tgt = int(rand prompt("Hola! Please tell me the upper bound") + 1); my $tries = 1; $tries++, print "You guessed too ", ($_ == -1 ? "high" : "low"), ".\n" while ($_ = $tgt <=> prompt "Your guess"); print "Correct! You guessed it after $tries tries.\n";

## Perl 6

```
my $maxnum = prompt("Hello, please give me an upper boundary: ");
until 0 < $maxnum < Inf {
say "Oops! The upper boundary should be > 0 and not Inf";
$maxnum = prompt("Please give me a valid upper boundary: ");
}
my $count = 0;
my $number = (1..$maxnum).pick;
say "I'm thinking of a number from 1 to $maxnum, try to guess it!";
repeat until my $guessed-right {
given prompt("Your guess: ") {
when /^[e|q]/ { say 'Goodbye.'; exit; }
when not 1 <= $_ <= $maxnum {
say "You really should give me a number from 1 to $maxnum."
}
$count++;
when $number { $guessed-right = True }
when $number < $_ { say "Sorry, my number is smaller." }
when $number > $_ { say "Sorry, my number is bigger." }
}
}
say "Great you guessed right after $count attempts!";
```

```
Hello, please give me an upper boundary: 10
I'm thinking of a number from 1 to 10, try to guess it!
Your guess: 5
Sorry, my number is bigger.
Your guess: 7
Sorry, my number is smaller.
Your guess: 6
Great you guessed right after 3 attempts!
```

## Phix

```
constant lower_limit = 0, upper_limit = 100
integer secret = rand(upper_limit-(lower_limit-1))+lower_limit-1
printf(1,"Guess the number between %d and %d: ", lower_limit & upper_limit)
while 1 do
integer guess = prompt_number("", lower_limit & upper_limit)
if guess=secret then exit end if
printf(1,"Your guess is too %s.\nTry again: ",{iff(guess>secret?"high":"low")})
end while
puts(1,"You got it!\n")
```

## PHP

<?php session_start(); if(isset($_SESSION['number'])) { $number = $_SESSION['number']; } else { $_SESSION['number'] = rand(1,10); } if($_POST["guess"]){ $guess = htmlspecialchars($_POST['guess']); echo $guess . "<br />"; if ($guess < $number) { echo "Your guess is too low"; } elseif($guess > $number) { echo "Your guess is too high"; } elseif($guess == $number) { echo "You got the correct number!"; } } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Guess A Number</title> </head> <body> <form action="<?=$_SERVER['PHP_SELF'] ?>" method="post" name="guess-a-number"> <label for="guess">Guess A Number:</label><br/ > <input type="text" name="guess" /> <input name="number" type="hidden" value="<?= $number ?>" /> <input name="submit" type="submit" /> </form> </body> </html>

## PicoLisp

{{trans|PureBasic}}

```
(de guessTheNumber ()
(use (Low High Guess)
(until
(and
(prin "Enter low limit : ")
(setq Low (read))
(prin "Enter high limit: ")
(setq High (read))
(> High Low) ) )
(seed (time))
(let Number (rand Low High)
(loop
(prin "Guess what number I have: ")
(T (= Number (setq Guess (read)))
(prinl "You got it!") )
(prinl
"Your guess is too "
(if (> Number Guess) "low" "high")
"." ) ) ) ) )
```

Output:

```
: (guessTheNumber)
Enter low limit : 1
Enter high limit: 64
Guess what number I have: 32
Your guess is too high.
Guess what number I have: 16
Your guess is too low.
Guess what number I have: 24
You got it!
```

## PowerShell

function Get-Guess { [int]$number = 1..100 | Get-Random [int]$guess = 0 [int[]]$guesses = @() Write-Host "Guess a number between 1 and 100" -ForegroundColor Cyan while ($guess -ne $number) { try { [int]$guess = Read-Host -Prompt "Guess" if ($guess -lt $number) { Write-Host "Greater than..." } elseif ($guess -gt $number) { Write-Host "Less than..." } else { Write-Host "You guessed it" } } catch [Exception] { Write-Host "Input a number between 1 and 100." -ForegroundColor Yellow continue } $guesses += $guess } [PSCustomObject]@{ Number = $number Guesses = $guesses } } $answer = Get-Guess Write-Host ("The number was {0} and it took {1} guesses to find it." -f $answer.Number, $answer.Guesses.Count)

{{Out}}

```
Guess a number between 1 and 100
Guess: 50
Greater than...
Guess: 60
Greater than...
Guess: a
Input a number between 1 and 100.
Guess: 70
Greater than...
Guess: 80
Less than...
Guess: 75
Less than...
Guess: 73
You guessed it
The number was 73 and it took 6 guesses to find it.
```

## PureBasic

```
OpenConsole()
Repeat
; Ask for limits, with sanity check
Print("Enter low limit : "): low =Val(Input())
Print("Enter high limit: "): High =Val(Input())
Until High>low
TheNumber=Random(High-low)+low
Debug TheNumber
Repeat
Print("Guess what number I have: "): Guess=Val(Input())
If Guess=TheNumber
PrintN("You got it!"): Break
ElseIf Guess < TheNumber
PrintN("Your guess is to low.")
Else
PrintN("Your guess is to high.")
EndIf
ForEver
```

## Prolog

{{works with|SWI-Prolog|6}}

```
main :-
play_guess_number.
/* Parameteres */
low(1).
high(10).
/* Basic Game Logic */
play_guess_number :-
low(Low),
high(High),
random(Low, High, N),
tell_range(Low, High),
repeat, % roughly, "repeat ... (until) Guess == N "
ask_for_guess(Guess),
give_feedback(N, Guess),
Guess == N.
/* IO Stuff */
tell_range(Low, High) :-
format('Guess an integer between ~d and ~d.~n', [Low,High]).
ask_for_guess(Guess) :-
format('Guess the number: '),
read(Guess).
give_feedback(N, Guess) :-
( \+integer(Guess) -> writeln('Invalid input.')
; Guess < N -> writeln('Your guess is too low.')
; Guess > N -> writeln('Your guess is too high.')
; Guess =:= N -> writeln("Correct!")
).
```

Input in the standard Prolog top level is terminated with a `.`

: E.g.,

```
?- main.
Guess an integer between 1 and 10.
Guess the number: a.
Invalid input.
Guess the number: 3.
Your guess is too low.
```

## Python

import random inclusive_range = (1, 100) print("Guess my target number that is between %i and %i (inclusive).\n" % inclusive_range) target = random.randint(*inclusive_range) answer, i = None, 0 while answer != target: i += 1 txt = input("Your guess(%i): " % i) try: answer = int(txt) except ValueError: print(" I don't understand your input of '%s' ?" % txt) continue if answer < inclusive_range[0] or answer > inclusive_range[1]: print(" Out of range!") continue if answer == target: print(" Ye-Haw!!") break if answer < target: print(" Too low.") if answer > target: print(" Too high.") print("\nThanks for playing.")

'''Sample Game'''

```
Guess my target number that is between 1 and 100 (inclusive).
Your guess(1): 50
Too high.
Your guess(2): 25
Too low.
Your guess(3): 40
Too high.
Your guess(4): 30
Too low.
Your guess(5): 35
Too high.
Your guess(6): 33
Too high.
Your guess(7): 32
Too high.
Your guess(8): 31
Ye-Haw!!
Thanks for playing.
```

'''Sample trapped Errors'''

```
Guess my target number that is between 1 and 100 (inclusive).
Your guess(1): 0
Out of range!
Your guess(2): 101
Out of range!
Your guess(3): Howdy
I don't understand your input of 'Howdy' ?
Your guess(4):
```

## R

GuessANumber <- function( low, high ) { print( sprintf("Guess a number between %d and %d until you get it right", low, high ) ); X <- low:high; number <- sample( X, 1 ); repeat { input <- as.numeric(readline()); if (input > number) { print("Too high, try again"); } else if (input < number) { print("Too low, try again");} else { print("Correct!"); break; } } }

## Racket

```
#lang racket
(define (guess-number min max)
(define target (+ min (random (- max min -1))))
(printf "I'm thinking of a number between ~a and ~a\n" min max)
(let loop ([prompt "Your guess"])
(printf "~a: " prompt)
(flush-output)
(define guess (read))
(define response
(cond [(not (exact-integer? guess)) "Please enter a valid integer"]
[(< guess target) "Too low"]
[(> guess target) "Too high"]
[else #f]))
(when response (printf "~a\n" response) (loop "Try again")))
(printf "Well guessed!\n"))
(guess-number 1 100)
```

## Retro

```
: high|low ( gn-g$ )
over > [ "high" ] [ "low" ] if ;
: checkGuess ( gn-gf || f )
2over = [ "You guessed correctly!\n" puts 2drop 0 ]
[ high|low "Sorry, your guess was too %s.\nTry again.\n" puts -1 ] if ;
: think ( -n )
random abs 100 mod 1+ ;
: guess ( - )
"I'm thinking of a number between 1 and 100.\n" puts
"Try to guess it!\n" puts
think [ getToken toNumber checkGuess ] while
"You got it!\n" puts ;
```

## REXX

To make the program more engaging, randomized words for the hint are used.

```
/*REXX program plays guess the number game with a human; the computer picks the number*/
low= 1 /*the lower range for the guessing game*/
high=100 /* " upper " " " " " */
try= 0 /*the number of valid (guess) attempts.*/
r=random(1, 100) /*get a random number (low ───► high).*/
lows= 'too_low too_small too_little below under underneath too_puny'
highs= 'too_high too_big too_much above over over_the_top too_huge'
erm= '***error***'
@gtn= "guess the number, it's between"
prompt=centre(@gtn low 'and' high '(inclusive) ───or─── Quit:', 79, "─")
/* [↓] BY 0 ─── used to LEAVE a loop*/
do ask=0 by 0; say; say prompt; say; pull g; g=space(g); say
do validate=0 by 0
select
when g=='' then iterate ask
when abbrev('QUIT', g, 1) then exit /*what a whoos.*/
when words(g)\==1 then say erm 'too many numbers entered:' g
when \datatype(g, 'N') then say erm g "isn't numeric"
when \datatype(g, 'W') then say erm g "isn't a whole number"
when g<low then say erm g 'is below the lower limit of' low
when g>high then say erm g 'is above the higher limit of' high
otherwise leave /*validate*/
end /*select*/
iterate ask
end /*validate*/
try=try+1
if g=r then leave
if g>r then what=word(highs, random(1, words(highs) ) )
else what=word( lows, random(1, words( lows) ) )
say 'your guess of' g "is" translate(what'.', , "_")
end /*ask*/
if try==1 then say 'Gadzooks!!! You guessed the number right away!'
else say 'Congratulations!, you guessed the number in ' try " tries."
/*stick a fork in it, we're all done. */
```

## Ring

```
fr = 1 t0 = 10
while true
see "Hey There,
### ==================
I'm thinking of a number between " + fr + " and " + t0 + ", Can you guess it??
Guess :> "
give x
n = nrandom(fr,t0)
if x = n see "
Congratulations :D
*****************************************************
** Your guess was right You Are Genius :D **
*****************************************************
"
exit
else
see "Oops its not true, you were just few steps"
if x > n see " up :)" else see " down :)" ok
see copy(nl,3)
ok
end
func nRandom s,e
while true
d = random(e)
if d >= s return d ok
end
```

## Ruby

{{trans|Mirah}}

number = rand(1..10) puts "Guess the number between 1 and 10" loop do begin user_number = Integer(gets) if user_number == number puts "You guessed it." break elsif user_number > number puts "Too high." else puts "Too low." end rescue ArgumentError puts "Please enter an integer." end end

## Rust

{{libheader|rand}}

use std::io::stdin; use rand::{Rng, thread_rng}; extern crate rand; const LOWEST: isize = 1; const HIGHEST: isize = 100; fn main() { let mut rng = thread_rng(); loop { let number: isize = rng.gen_range(LOWEST, HIGHEST + 1); let mut num_guesses = 0; println!("I have chosen my number between {} and {}. You know what to do", LOWEST, HIGHEST); loop { num_guesses += 1; let mut line = String::new(); let res = stdin().read_line(&mut line); let input: Option<isize> = res.ok().map_or(None, |_| line.trim().parse().ok()); match input { None => println!("numbers only, please"), Some(n) if n == number => { println!("you got it in {} tries!", num_guesses); break; } Some(n) if n < number => println!("too low!"), Some(n) if n > number => println!("too high!"), Some(_) => println!("something went wrong") } } } }

```
I have chosen my number between 0 and 100. You know what to do
50
too high!
25
too high!
12
too low!
18
too low!
21
too low!
23
you got it in 6 tries!
```

## Scala

import java.util.Random import java.util.Scanner val scan = new Scanner(System.in) val random = new Random val (from , to) = (1, 100) val randomNumber = random.nextInt(to - from + 1) + from var guessedNumber = 0 printf("The number is between %d and %d.\n", from, to) do { print("Guess what the number is: ") guessedNumber = scan.nextInt if (guessedNumber > randomNumber) println("Your guess is too high!") else if (guessedNumber < randomNumber) println("Your guess is too low!") else println("You got it!") } while (guessedNumber != randomNumber)

## Scheme

{{works with|Chicken Scheme}} {{works with|Guile}}

```
(define maximum 5)
(define minimum -5)
(define number (+ (random (- (+ maximum 1) minimum)) minimum))
(display "Pick a number from ")
(display minimum)
(display " through ")
(display maximum)
(display ".\n> ")
(do ((guess (read) (read))) ((eq? guess number))
(if (or (>= guess maximum) (< guess minimum))
(display "Out of range!\n> ")
(begin
(if (> guess number)
(display "Too high!\n> "))
(if (< guess number)
(display "Too low!\n> ")))))
(display "Correct!\n")
```

## Seed7

```
$ include "seed7_05.s7i";
const integer: lower_limit is 0;
const integer: upper_limit is 100;
const proc: main is func
local
var integer: number is 0;
var integer: guess is 0;
begin
number := rand(lower_limit, upper_limit);
write("Guess the number between " <& lower_limit <& " and " <& upper_limit <& ": ");
while succeeds(readln(guess)) and number <> guess do
write("Your guess was too ");
if number < guess then
writeln("high.");
else
writeln("low.");
end if;
write("Try again: ");
end while;
if number = guess then
writeln("You guessed correctly!");
else
writeln("You gave up!");
end if;
end func;
```

## Sidef

{{trans|Ruby}}

var number = rand(1..10); say "Guess the number between 1 and 10"; loop { given(var n = Sys.scanln("> ").to_i) { when (number) { say "You guessed it."; break } case (n < number) { say "Too low" } default { say "Too high" } } }

## Small Basic

```
number=Math.GetRandomNumber(10)
TextWindow.WriteLine("I just thought of a number between 1 and 10. What is it?")
While guess<>number
guess=TextWindow.ReadNumber()
If guess>number Then
TextWindow.WriteLine("Lower number!")
EndIf
If guess<number Then
TextWindow.WriteLine("Higher number!")
EndIf
EndWhile
TextWindow.WriteLine("You win!")
```

## Sparkling

```
printf("Lower bound: ");
let lowerBound = toint(getline());
printf("Upper bound: ");
let upperBound = toint(getline());
assert(upperBound > lowerBound, "upper bound must be greater than lower bound");
seed(time());
let n = floor(random() * (upperBound - lowerBound) + lowerBound);
var guess;
print();
while true {
printf("Your guess: ");
guess = toint(getline());
if guess < n {
print("too low");
} else if guess > n {
print("too high");
} else {
print("You guessed it!");
break;
}
}
```

## Swift

import Cocoa var found = false let randomNum = Int(arc4random_uniform(100) + 1) println("Guess a number between 1 and 100\n") while (!found) { var fh = NSFileHandle.fileHandleWithStandardInput() println("Enter a number: ") let data = fh.availableData let str = NSString(data: data, encoding: NSUTF8StringEncoding) if (str?.integerValue == randomNum) { found = true println("Well guessed!") } else if (str?.integerValue < randomNum) { println("Good try but the number is more than that!") } else if (str?.integerValue > randomNum) { println("Good try but the number is less than that!") } }

## Tcl

set from 1 set to 10 set target [expr {int(rand()*($to-$from+1) + $from)}] puts "I have thought of a number from $from to $to." puts "Try to guess it!" while 1 { puts -nonewline "Enter your guess: " flush stdout gets stdin guess if {![string is int -strict $guess] || $guess < $from || $guess > $to} { puts "Your guess should be an integer from $from to $to (inclusive)." } elseif {$guess > $target} { puts "Your guess was too high. Try again!" } elseif {$guess < $target} { puts "Your guess was too low. Try again!" } else { puts "Well done! You guessed it." break } }

Sample output:

```
I have thought of a number from 1 to 10.
Try to guess it!
Enter your guess: 2
Your guess was too low. Try again!
Enter your guess: skfg
Your guess should be an integer from 1 to 10 (inclusive).
Enter your guess: 9
Your guess was too high. Try again!
Enter your guess: 5
Your guess was too low. Try again!
Enter your guess: 7
Your guess was too high. Try again!
Enter your guess: 6
Well done! You guessed it.
```

## TUSCRIPT

```
$$ MODE TUSCRIPT
PRINT "Find the luckynumber (7 tries)!"
SET luckynumber=RANDOM NUMBERS (1,100,1)
LOOP round=1,7
SET message=CONCAT ("[",round,"] Please insert a number")
ASK $message: n=""
IF (n!='digits') THEN
PRINT "wrong insert: ",n," Please insert a digit"
ELSEIF (n>100.or.n<1) THEN
PRINT "wrong insert: ",n," Please insert a number between 1-100"
ELSEIF (n==#luckynumber) THEN
PRINT "BINGO"
EXIT
ELSEIF (n.gt.#luckynumber) THEN
PRINT "too big"
ELSEIF (n.lt.#luckynumber) THEN
PRINT "too small"
ENDIF
IF (round==7) PRINT/ERROR "You've lost: luckynumber was: ",luckynumber
ENDLOOP
```

Output:

```
Find the luckynumber (7 tries)!
[1] Please insert a number >51
too small
[2] Please insert a number >76
too small
[3] Please insert a number >89
too big
[4] Please insert a number >80
too small
[5] Please insert a number >84
too small
[6] Please insert a number >86
too small
[7] Please insert a number >88
too big
@@@@@@@@ You've lost: luckynumber was: 87
```

{{omit from|GUISS}}

## UNIX Shell

{{works with|Bourne Again SHell}} {{works with|Public Domain Korn SHell}} {{works with|Z SHell}}

function guess { [[ -n $BASH_VERSION ]] && shopt -s extglob [[ -n $ZSH_VERSION ]] && set -o KSH_GLOB local -i max=${1:-100} local -i number=RANDOM%max+1 local -i guesses=0 local guess while true; do echo -n "Guess my number! (range 1 - $max): " read guess if [[ "$guess" != +([0-9]) ]] || (( guess < 1 || guess > max )); then echo "Guess must be a number between 1 and $max." continue fi let guesses+=1 if (( guess < number )); then echo "Too low!" elif (( guess == number )); then echo "You got it in $guesses guesses!" break else echo "Too high!" fi done }

Sample run:

```
$ guess
Guess my number! (range 1 - 100): 50
Too low!
Guess my number! (range 1 - 100): 75
Too high!
Guess my number! (range 1 - 100): 62
Too low!
Guess my number! (range 1 - 100): 69
Too low!
Guess my number! (range 1 - 100): 72
You got it in 5 guesses!
```

## Ursa

{{trans|Python}}

```
decl int high low
set low 0
set high 100
out "Guess a number between " low " and " high "." endl endl console
decl int target answer i
decl ursa.util.random random
set target (int (+ 1 (+ low (random.getint (int (- high low))))))
while (not (= answer target))
inc i
out "Your guess(" i "): " console
set answer (in int console)
if (or (< answer low) (> answer high))
out " Out of range!" endl console
continue
end if
if (= answer target)
out " Ye-Haw!!" endl console
continue
end if
if (< answer target)
out " Too low." endl console
end if
if (> answer target)
out " Too high." endl console
end if
end while
out endl "Thanks for playing." endl console
```

## Vala

```
void main(){
const int from = 1;
const int to = 100;
int random = Random.int_range(from, to);
int guess = 0;
while (guess != random){
stdout.printf("Guess the target number that's between %d and %d.\n", from, to);
string? num = stdin.read_line ();
num.canon("0123456789", '!'); // replaces any character in num that's not in "0123456789" with "!"
if ("!" in num)
stdout.printf("Please enter a number!\n");
else{
guess = int.parse(num);
if (guess > random && guess <= to)
stdout.printf("Too high!\n");
if (guess < random && guess >= from)
stdout.printf("Too low!\n");
if (guess == random)
stdout.printf("You guess it! You win!\n");
if (guess < from || guess > to)
stdout.printf("%d Your guess isn't even in the right range!\n", guess);
}
}//while
} // main
```

Shorter but no error checking

```
int main() {
int guess, x = Random.int_range(1, 10);
stdout.printf("Make a guess (1-10): ");
while((guess = int.parse(stdin.read_line())) != x) {
stdout.printf("%s! Try again: ", x < guess ? "Lower" : "Higher");
}
stdout.printf("Got it!\n");
return 0;
}
```

## VBA Excel

The Application.InputBox display a message when input is inappropriate.

```
Sub GuessTheNumberWithFeedback()
Dim Nbc&, Nbp&, m&, n&, c&
Randomize Timer
m = 11
n = 100
Nbc = Int((Rnd * (n - m + 1)) + m)
Do
c = c + 1
Nbp = Application.InputBox("Choose a number between " & m & " and " & n & " : ", "Enter your guess", Type:=1)
Select Case Nbp
Case Is > Nbc: MsgBox "Higher than target!"
Case Is < Nbc: MsgBox "Less than target!"
Case Else: Exit Do
End Select
Loop
MsgBox "Well guessed!" & vbCrLf & "You find : " & Nbc & " in " & c & " guesses!"
End Sub
```

## VBScript

```
Dim max,min,secretnum,numtries,usernum
max=100
min=1
numtries=0
Randomize
secretnum = Int((max-min+1)*Rnd+min)
Do While usernum <> secretnum
usernum = Inputbox("Guess the secret number beween 1-100","Guessing Game")
If IsEmpty(usernum) Then
WScript.Quit
End If
If IsNumeric(usernum) Then
numtries = numtries + 1
usernum = Cint(usernum)
If usernum < secretnum Then
Msgbox("The secret number is higher than " + CStr(usernum))
ElseIf usernum > secretnum Then
Msgbox("The secret number is lower than " + CStr(usernum))
Else
Msgbox("Congratulations, you found the secret number in " + CStr(numtries) + " guesses!")
End If
Else
Msgbox("Please enter a valid number.")
End If
Loop
```

## XLISP

(defun guessing-game (a b) ; minimum and maximum, to be supplied by the user (defun prompt () (display "What is your guess? ") (define guess (read)) (if (eq guess n) ; EQ, unlike =, won't blow up ; if GUESS isn't a number (display "Well guessed!") (begin (display (cond ((not (integer? guess)) "Come on, that isn't even an integer") ((or (< guess a) (> guess b)) "Now you k n o w it won't be that") ((< guess n) "Too low") ((> guess n) "Too high"))) (display "! Try again...") (newline) (prompt)))) (define n (+ (random (- (+ b 1) a)) a)) (display "I have thought of an integer between ") (display a) (display " and ") (display b) (display ". Try to guess it!") (newline) (prompt))

{{out}}

```
[1] (guessing-game 19 36)
I have thought of an integer between 19 and 36. Try to guess it!
What is your guess? 2
Now you k n o w it won't be that! Try again...
What is your guess? 25
Too high! Try again...
What is your guess? 24.5
Come on, that isn't even an integer! Try again...
What is your guess? n
Come on, that isn't even an integer! Try again...
What is your guess? 19
Too low! Try again...
What is your guess? 22
Too high! Try again...
What is your guess? 21
Too high! Try again...
What is your guess? 20
Well guessed!
```

## XPL0

```
include c:\cxpl\codes;
int Lo, Hi, C, Guess, Number;
[loop [Text(0, "Low limit: "); Lo:= IntIn(0);
Text(0, "High limit: "); Hi:= IntIn(0);
if Lo < Hi then quit;
Text(0, "Low limit must be lower!^M^J^G");
];
Number:= Ran(Hi-Lo+1)+Lo;
Text(0, "I'm thinking of a number between ");
IntOut(0, Lo); Text(0, " and "); IntOut(0, Hi); Text(0, ".^M^J");
repeat Text(0, "Can you guess the number? ");
loop [C:= ChIn(0);
if C>=^0 & C<=^9 then quit;
Text(0, "Please enter a number in the given range.^M^J");
OpenI(0);
];
Backup; Guess:= IntIn(0);
Text(0, if Guess = Number then "Correct!"
else if Guess > Number then "Nope, too high."
else "You're too low.");
CrLf(0);
until Guess = Number;
]
```

Example output:

```
Low limit: 1
High limit: 10
I'm thinking of a number between 1 and 10.
Can you guess the number? maybe
Please enter a number in the given range.
3
You're too low.
Can you guess the number? 6
You're too low.
Can you guess the number? 8
Correct!
```

## zkl

```
r:=(0).random(10)+1;
while(1){
n:=ask("Num between 1 & 10: ");
try{n=n.toInt()}catch{ println("Number please"); continue; }
if(n==r){ println("Well guessed!"); break; }
println((n<r) and "small" or "big");
}
```

{{out}}

```
Num between 1 & 10: foo
Number please
Num between 1 & 10: 5
big
Num between 1 & 10: 3
big
Num between 1 & 10: 2
big
Num between 1 & 10: 1
Well guessed!
```

## ZX Spectrum Basic

```
ZX Spectrum Basic has no [[:Category:Conditional loops|conditional loop]] constructs, so we have to emulate them here using IF and GO TO.
1 LET n=INT (RND*10)+1
2 INPUT "Guess a number that is between 1 and 10: ",g: IF g=n THEN PRINT "That's my number!": STOP
3 IF g<n THEN PRINT "That guess is too low!": GO TO 2
4 IF g>n THEN PRINT "That guess is too high!": GO TO 2
```