⚠️ 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|Iteration}} [[Category:Loop modifiers]] [[Category:Simple]]
;Task: Show a loop which prints random numbers (each number newly generated each loop) from 0 to 19 (inclusive).
If a number is 10, stop the loop after printing it, and do not generate any further numbers.
Otherwise, generate and print a second random number before restarting the loop.
If the number 10 is never generated as the first number in a loop, loop forever.
;Related tasks:
- [[Loop over multiple arrays simultaneously]]
- [[Loops/Break]]
- [[Loops/Continue]]
- [[Loops/Do-while]]
- [[Loops/Downward for]]
- [[Loops/For]]
- [[Loops/For with a specified step]]
- [[Loops/Foreach]]
- [[Loops/Increment loop index within loop body]]
- [[Loops/Infinite]]
- [[Loops/N plus one half]]
- [[Loops/Nested]]
- [[Loops/While]]
- [[Loops/with multiple ranges]]
11l
{{trans|Python}}
L
V a = random:(20)
print(a)
I a == 10
L.break
V b = random:(20)
print(b)
360 Assembly
* Loops Break 15/02/2017
LOOPBREA CSECT
USING LOOPBREA,R13 base register
B 72(R15) skip savearea
DC 17F'0' savearea
STM R14,R12,12(R13) prolog
ST R13,4(R15) " <-
ST R15,8(R13) " ->
LR R13,R15 " addressability
LOOP MVC PG,=CL80' ' clean buffer
LA R8,PG ipg=0
BAL R14,RANDINT call randint
C R6,=F'10' if k=10 then leave
BE ENDLOOP <-- loop break
BAL R14,RANDINT call randint
XPRNT PG,L'PG print buffer
B LOOP loop forever
ENDLOOP XPRNT PG,L'PG print buffer
L R13,4(0,R13) epilog
LM R14,R12,12(R13) " restore
XR R15,R15 " rc=0
BR R14 exit
RANDINT L R5,RANDSEED randint
M R4,=F'397204091' "
D R4,=X'7FFFFFFF' "
ST R4,RANDSEED "
LR R5,R4 "
SR R4,R4 "
D R4,=F'20' "
LR R6,R4 k=randint(20)
XDECO R6,XDEC edit k
MVC 0(4,R8),XDEC+8 output k
LA R8,4(R8) ipg=ipg+4
BR R14 return
RANDSEED DC F'39710831' seed
PG DS CL80 buffer
XDEC DS CL12
YREGS
END LOOPBREA
{{out}}
2 3
9 10
14 5
18 16
5 0
1 3
7 17
19 8
17 12
10
6502 Assembly
Code is called as a subroutine (i.e. JSR LoopBreakSub). Specific OS/hardware routines for generating random numbers and printing are left unimplemented.
LoopBreakSub: PHA ;push accumulator onto stack
BreakLoop: JSR GenerateRandomNum ;routine not implemented
;generates random number and puts in memory location RandomNumber
LDA RandomNumber
JSR DisplayAccumulator ;routine not implemented
CMP #10
BEQ Break
JSR GenerateRandomNum
LDA RandomNumber
JSR DisplayAccumulator
JMP BreakLoop
Break: PLA ;restore accumulator from stack
RTS ;return from subroutine
Ada
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Numerics.Discrete_Random;
procedure Test_Loop_Break is
type Value_Type is range 0..19;
package Random_Values is new Ada.Numerics.Discrete_Random (Value_Type);
use Random_Values;
Dice : Generator;
A, B : Value_Type;
begin
loop
A := Random (Dice);
Put_Line (Value_Type'Image (A));
exit when A = 10;
B := Random (Dice);
Put_Line (Value_Type'Image (B));
end loop;
end Test_Loop_Break;
Aime
integer
main(void)
{
integer a, b;
while (1) {
a = drand(19);
o_integer(a);
o_byte('\n');
if (a == 10) {
break;
}
b = drand(19);
o_integer(b);
o_byte('\n');
}
return 0;
}
ALGOL 60
{{works with|ALGOL 60|OS/360}}
'BEGIN' 'COMMENT' Loops/Break - ALGOL60 - 18/06/2018;
'INTEGER' SEED;
'INTEGER' 'PROCEDURE' RANDOM(N);
'VALUE' N; 'INTEGER' N;
'BEGIN'
SEED:=(SEED*19157+12347) '/' 21647;
RANDOM:=SEED-(SEED '/' N)*N+1
'END' RANDOM;
'INTEGER' I,J,K;
SYSACT(1,6,120);SYSACT(1,8,60);SYSACT(1,12,1);'COMMENT' open print;
SEED:=31567;
J:=0;
'FOR' I:=1, I+1 'WHILE' I 'LESS' 100 'DO' 'BEGIN'
J:=J+1;
K:=RANDOM(20);
OUTINTEGER(1,K);
'IF' J=8 'THEN' 'BEGIN'
SYSACT(1,14,1); 'COMMENT' skip line;
J:=0
'END';
'IF' K=10 'THEN' 'GOTO' LAB
'END';
LAB:
SYSACT(1,14,1); 'COMMENT' skip line;
'END'
{{out}}
+17 +4 +20 +3 +16 +5 +1 +17
+11 +2 +12 +5 +7 +6 +10
ALGOL 68
{{trans|C|Note: This specimen retains the original C coding style. }} {{works with|ALGOL 68|Standard - no extensions to language used}} {{wont work with|ALGOL 68G|Any - in a68G next random takes no seed argument}} {{works with|ELLA ALGOL 68|Any (with appropriate job cards)}}
main: (
INT a, b;
INT seed := 4; # chosen by a fair dice roll, guaranteed to be random c.f. http://xkcd.com/221/ #
# first random; #
WHILE
a := ENTIER (next random(seed) * 20);
print((a));
# WHILE # NOT (a = 10) DO
b := ENTIER (next random(seed) * 20);
print((b, new line))
OD;
print(new line)
)
{{out}}
+13 +6
+1 +8
+13 +2
+1 +12
+0 +12
+14 +8
+9 +2
+19 +13
+0 +4
+8 +14
+17 +7
+11 +9
+7 +8
+2 +1
+11 +2
+13 +18
+3 +7
+11 +17
+4 +13
+16 +12
+19 +17
+9 +7
+8 +5
+4 +8
+7 +5
+0 +18
+8 +13
+7 +4
+10
```
## AppleScript
```AppleScript
repeat
set a to random number from 0 to 19
if a is 10 then
log a
exit repeat
end if
set b to random number from 0 to 19
log a & b
end repeat
```
{{out}}
(*12, 6*)
(*7, 8*)
(*17, 4*)
(*7, 2*)
(*0, 5*)
(*6, 3*)
(*5, 5*)
(*3, 14*)
(*7, 7*)
(*3, 11*)
(*5, 16*)
(*18, 2*)
(*5, 2*)
(*15, 17*)
(*16, 10*)
(*4, 18*)
(*8, 5*)
(*4, 15*)
(*11, 14*)
(*7, 2*)
(*1, 7*)
(*7, 7*)
(*4, 9*)
(*12, 17*)
(*8, 16*)
(*9, 1*)
(*16, 15*)
(*8, 2*)
(*9, 6*)
(*13, 6*)
(*17, 0*)
(*17, 18*)
(*4, 7*)
(*8, 10*)
(*11, 0*)
(*14, 17*)
(*9, 8*)
(*2, 17*)
(*1, 5*)
(*4, 5*)
(*5, 2*)
(*10*)
```
## Arc
```Arc
(point break
(while t
(let x (rand 20)
(prn "a: " x)
(if (is x 10)
(break)))
(prn "b: " (rand 20))))
```
## ARM Assembly
{{works with|as|Raspberry Pi}}
```ARM Assembly
/* ARM assembly Raspberry PI */
/* program loopbreak.s */
/* Constantes */
.equ STDOUT, 1 @ Linux output console
.equ EXIT, 1 @ Linux syscall
.equ WRITE, 4 @ Linux syscall
/*********************************/
/* Initialized data */
/*********************************/
.data
szMessEndLoop: .asciz "loop break with value : \n"
szMessResult: .ascii "Resultat = " @ message result
sMessValeur: .fill 12, 1, ' '
.asciz "\n"
.align 4
iGraine: .int 123456
/*********************************/
/* UnInitialized data */
/*********************************/
.bss
/*********************************/
/* code section */
/*********************************/
.text
.global main
main: @ entry of program
push {fp,lr} @ saves 2 registers
1: @ begin loop
mov r4,#20
2:
mov r0,#19
bl genereraleas @ generate number
cmp r0,#10 @ compar value
beq 3f @ break if equal
ldr r1,iAdrsMessValeur @ display value
bl conversion10 @ call function with 2 parameter (r0,r1)
ldr r0,iAdrszMessResult
bl affichageMess @ display message
subs r4,#1 @ decrement counter
bgt 2b @ loop if greather
b 1b @ begin loop one
3:
mov r2,r0 @ save value
ldr r0,iAdrszMessEndLoop
bl affichageMess @ display message
mov r0,r2
ldr r1,iAdrsMessValeur
bl conversion10 @ call function with 2 parameter (r0,r1)
ldr r0,iAdrszMessResult
bl affichageMess @ display message
100: @ standard end of the program
mov r0, #0 @ return code
pop {fp,lr} @restaur 2 registers
mov r7, #EXIT @ request to exit program
svc #0 @ perform the system call
iAdrsMessValeur: .int sMessValeur
iAdrszMessResult: .int szMessResult
iAdrszMessEndLoop: .int szMessEndLoop
/******************************************************************/
/* display text with size calculation */
/******************************************************************/
/* r0 contains the address of the message */
affichageMess:
push {r0,r1,r2,r7,lr} @ save registres
mov r2,#0 @ counter length
1: @ loop length calculation
ldrb r1,[r0,r2] @ read octet start position + index
cmp r1,#0 @ if 0 its over
addne r2,r2,#1 @ else add 1 in the length
bne 1b @ and loop
@ so here r2 contains the length of the message
mov r1,r0 @ address message in r1
mov r0,#STDOUT @ code to write to the standard output Linux
mov r7, #WRITE @ code call system "write"
svc #0 @ call systeme
pop {r0,r1,r2,r7,lr} @ restaur des 2 registres */
bx lr @ return
/******************************************************************/
/* Converting a register to a decimal */
/******************************************************************/
/* r0 contains value and r1 address area */
conversion10:
push {r1-r4,lr} @ save registers
mov r3,r1
mov r2,#10
1: @ start loop
bl divisionpar10 @ r0 <- dividende. quotient ->r0 reste -> r1
add r1,#48 @ digit
strb r1,[r3,r2] @ store digit on area
sub r2,#1 @ previous position
cmp r0,#0 @ stop if quotient = 0 */
bne 1b @ else loop
@ and move spaces in first on area
mov r1,#' ' @ space
2:
strb r1,[r3,r2] @ store space in area
subs r2,#1 @ @ previous position
bge 2b @ loop if r2 >= zéro
100:
pop {r1-r4,lr} @ restaur registres
bx lr @return
/***************************************************/
/* division par 10 signé */
/* Thanks to http://thinkingeek.com/arm-assembler-raspberry-pi/*
/* and http://www.hackersdelight.org/ */
/***************************************************/
/* r0 dividende */
/* r0 quotient */
/* r1 remainder */
divisionpar10:
/* r0 contains the argument to be divided by 10 */
push {r2-r4} /* save registers */
mov r4,r0
mov r3,#0x6667 @ r3 <- magic_number lower
movt r3,#0x6666 @ r3 <- magic_number upper
smull r1, r2, r3, r0 @ r1 <- Lower32Bits(r1*r0). r2 <- Upper32Bits(r1*r0)
mov r2, r2, ASR #2 /* r2 <- r2 >> 2 */
mov r1, r0, LSR #31 /* r1 <- r0 >> 31 */
add r0, r2, r1 /* r0 <- r2 + r1 */
add r2,r0,r0, lsl #2 /* r2 <- r0 * 5 */
sub r1,r4,r2, lsl #1 /* r1 <- r4 - (r2 * 2) = r4 - (r0 * 10) */
pop {r2-r4}
bx lr /* leave function */
/***************************************************/
/* Generation random number */
/***************************************************/
/* r0 contains limit */
genereraleas:
push {r1-r4,lr} @ save registers
ldr r4,iAdriGraine
ldr r2,[r4]
ldr r3,iNbDep1
mul r2,r3,r2
ldr r3,iNbDep1
add r2,r2,r3
str r2,[r4] @ maj de la graine pour l appel suivant
mov r1,r0 @ divisor
mov r0,r2 @ dividende
bl division
mov r0,r3 @ résult = remainder
100: @ end function
pop {r1-r4,lr} @ restaur registers
bx lr @ return
/********************************************************************/
iAdriGraine: .int iGraine
iNbDep1: .int 0x343FD
iNbDep2: .int 0x269EC3
/***************************************************/
/* integer division unsigned */
/***************************************************/
division:
/* r0 contains dividend */
/* r1 contains divisor */
/* r2 returns quotient */
/* r3 returns remainder */
push {r4, lr}
mov r2, #0 @ init quotient
mov r3, #0 @ init remainder
mov r4, #32 @ init counter bits
b 2f
1: @ loop
movs r0, r0, LSL #1 @ r0 <- r0 << 1 updating cpsr (sets C if 31st bit of r0 was 1)
adc r3, r3, r3 @ r3 <- r3 + r3 + C. This is equivalent to r3 <- (r3 << 1) + C
cmp r3, r1 @ compute r3 - r1 and update cpsr
subhs r3, r3, r1 @ if r3 >= r1 (C=1) then r3 <- r3 - r1
adc r2, r2, r2 @ r2 <- r2 + r2 + C. This is equivalent to r2 <- (r2 << 1) + C
2:
subs r4, r4, #1 @ r4 <- r4 - 1
bpl 1b @ if r4 >= 0 (N=0) then loop
pop {r4, lr}
bx lr
```
## AutoHotkey
```AutoHotkey
Loop
{
Random, var, 0, 19
output = %output%`n%var%
If (var = 10)
Break
Random, var, 0, 19
output = %output%`n%var%
}
MsgBox % output
```
## AWK
```awk
BEGIN {
for (;;) {
print n = int(rand() * 20)
if (n == 10)
break
print int(rand() * 20)
}
}
```
## Axe
Because Axe only supports breaking out of loops as end conditions, the behavior must be simulated using a return statement. Note, however, that this will exit the current call context, not the necessarily just the current loop.
```axe
While 1
rand^20→A
Disp A▶Dec
ReturnIf A=10
rand^20→B
Disp B▶Dec,i
End
```
## BASIC
=
## BaCon
=
```freebasic
REPEAT
number = RANDOM(20)
PRINT "first " ,number
IF number = 10 THEN
BREAK
ENDIF
PRINT "second ",RANDOM(20)
UNTIL FALSE
```
=
## Commodore BASIC
=
In Commodore BASIC, the function RND() generates a floating point number from 0.0 to 1.0 (exclusive).
```commodorebasic
10 X = RND(-TI) : REM SEED RN GENERATOR
20 A = INT(RND(1)*20)
30 PRINT A
40 IF A = 10 THEN 80
50 B = INT(RND(1)*20)
60 PRINT B
70 GOTO 20
80 END
```
==={{header|IS-BASIC}}===
100 RANDOMIZE
110 DO
120 LET A=RND(20)+1
130 PRINT A,
140 IF A=10 THEN EXIT DO
150 PRINT RND(20)+1
160 LOOP
```
=
## QuickBASIC
=
{{works with|QuickBasic|4.5}}
```qbasic
do
a = int(rnd * 20)
print a
if a = 10 then exit loop 'EXIT FOR works the same inside FOR loops
b = int(rnd * 20)
print b
loop
```
=== {{header|ZX Spectrum Basic}} ===
On the ZX Spectrum, for loops must be terminated through the NEXT statement, otherwise a memory leak will occur. To terminate a loop prematurely, set the loop counter to the last iterative value and jump to the NEXT statement:
```zxbasic
10 FOR l = 1 TO 20
20 IF l = 10 THEN LET l = 20: GO TO 40: REM terminate the loop
30 PRINT l
40 NEXT l
50 STOP
```
The correct solution:
```zxbasic
10 LET a = INT (RND * 20)
20 PRINT a
30 IF a = 10 THEN STOP
40 PRINT INT (RND * 20)
50 GO TO 10
```
## Batch File
```dos
@echo off
:loop
set /a N=%RANDOM% %% 20
echo %N%
if %N%==10 exit /b
set /a N=%RANDOM% %% 20
echo %N%
goto loop
```
## BBC BASIC
{{works with|BBC BASIC for Windows}}
```bbcbasic
REPEAT
num% = RND(20)-1
PRINT num%
IF num%=10 THEN EXIT REPEAT
PRINT RND(20)-1
UNTIL FALSE
```
## bc
```bc
s = 1 /* seed of the random number generator */
scale = 0
/* Random number from 0 to 20. */
define r() {
auto a
while (1) {
/* Formula (from POSIX) for random numbers of low quality. */
s = (s * 1103515245 + 12345) % 4294967296
a = s / 65536 /* a in [0, 65536) */
if (a >= 16) break /* want a >= 65536 % 20 */
}
return (a % 20)
}
while (1) {
n = r()
n /* print 1st number */
if (n == 10) break
r() /* print 2nd number */
}
quit
```
## Befunge
```Befunge
>60v *2\<
>?>\1-:|
1+ $
>^ 7
v.:%++67<
>55+-#v_@
>60v *2\<
>?>\1-:|
1+ $
>^ 7
^ .%++67<
```
## C
```c
int main(){
time_t t;
int a, b;
srand((unsigned)time(&t));
for(;;){
a = rand() % 20;
printf("%d\n", a);
if(a == 10)
break;
b = rand() % 20;
printf("%d\n", b);
}
return 0;
}
```
Output (example):
```txt
12
18
2
8
10
18
9
9
4
10
```
## C#
```c#
class Program
{
static void Main(string[] args)
{
Random random = new Random();
while (true)
{
int a = random.Next(20);
Console.WriteLine(a);
if (a == 10)
break;
int b = random.Next(20)
Console.WriteLine(b);
}
Console.ReadLine();
}
}
```
## C++
```cpp
#include
#include
#include
int main(){
srand(time(NULL)); // randomize seed
while(true){
const int a = rand() % 20; // biased towards lower numbers if RANDMAX % 20 > 0
std::cout << a << std::endl;
if(a == 10)
break;
const int b = rand() % 20;
std::cout << b << std::endl;
}
return 0;
}
```
## Chapel
```chapel
use Random;
var r = new RandomStream();
while true {
var a = floor(r.getNext() * 20):int;
writeln(a);
if a == 10 then break;
var b = floor(r.getNext() * 20):int;
writeln(b);
}
delete r;
```
## Chef
"Liquify" is now depreciated in favor of "Liquefy", but my interpreter/compiler ([http://search.cpan.org/~smueller/Acme-Chef/ Acme::Chef]) works only with "Liquify" so that's how I'm leaving it. At least it'll work no matter which version you use.
```Chef
Healthy Vita-Sauce Loop - Broken.
Makes a whole lot of sauce for two people.
Ingredients.
0 g Vitamin A
1 g Vitamin B
2 g Vitamin C
3 g Vitamin D
4 g Vitamin E
5 g Vitamin F
6 g Vitamin G
7 g Vitamin H
8 g Vitamin I
9 g Vitamin J
10 g Vitamin K
11 g Vitamin L
12 g Vitamin M
13 g Vitamin N
14 g Vitamin O
15 g Vitamin P
16 g Vitamin Q
17 g Vitamin R
18 g Vitamin S
19 g Vitamin T
20 g Vitamin U
21 g Vitamin V
22 g Vitamin W
32 g Vitamin X
24 g Vitamin Y
25 g Vitamin Z
Method.
Liquify Vitamin X.
Put Vitamin N into 1st mixing bowl.
Fold Vitamin Y into 1st mixing bowl.
Liquify Vitamin Y.
Clean 1st mixing bowl.
Put Vitamin K into 1st mixing bowl.
Fold Vitamin Z into 1st mixing bowl.
Liquify Vitamin Z.
Clean 1st mixing bowl.
Put Vitamin Y into 4th mixing bowl.
Put Vitamin Z into 4th mixing bowl.
Pour contents of the 4th mixing bowl into the 2nd baking dish.
Put Vitamin A into 2nd mixing bowl. Put Vitamin B into 2nd mixing bowl. Put Vitamin C into 2nd mixing bowl. Put Vitamin D into 2nd mixing bowl. Put Vitamin E into 2nd mixing bowl. Put Vitamin F into 2nd mixing bowl. Put Vitamin G into 2nd mixing bowl. Put Vitamin H into 2nd mixing bowl. Put Vitamin I into 2nd mixing bowl. Put Vitamin J into 2nd mixing bowl. Put Vitamin K into 2nd mixing bowl. Put Vitamin L into 2nd mixing bowl. Put Vitamin M into 2nd mixing bowl. Put Vitamin N into 2nd mixing bowl. Put Vitamin O into 2nd mixing bowl. Put Vitamin P into 2nd mixing bowl. Put Vitamin Q into 2nd mixing bowl. Put Vitamin R into 2nd mixing bowl. Put Vitamin S into 2nd mixing bowl. Put Vitamin T into 2nd mixing bowl.
Verb the Vitamin V.
Mix the 2nd mixing bowl well.
Fold Vitamin U into 2nd mixing bowl.
Put Vitamin U into 3rd mixing bowl.
Remove Vitamin K from 3rd mixing bowl.
Fold Vitamin V into 3rd mixing bowl.
Put Vitamin X into 1st mixing bowl.
Put Vitamin V into 1st mixing bowl.
Verb until verbed.
Pour contents of the 1st mixing bowl into the 1st baking dish.
Serves 2.
```
## Clojure
```lisp
(loop [[a b & more] (repeatedly #(rand-int 20))]
(println a)
(when-not (= 10 a)
(println b)
(recur more)))
```
## COBOL
{{works with|OpenCOBOL}}
```cobol
IDENTIFICATION DIVISION.
PROGRAM-ID. Random-Nums.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 Num PIC Z9.
PROCEDURE DIVISION.
Main.
PERFORM FOREVER
PERFORM Generate-And-Display-Num
IF Num = 10
EXIT PERFORM
ELSE
PERFORM Generate-And-Display-Num
END-IF
END-PERFORM
GOBACK
.
Generate-And-Display-Num.
COMPUTE Num = FUNCTION REM(FUNCTION RANDOM * 100, 20)
DISPLAY Num
.
```
## CoffeeScript
We can use print from the Rhino JavaScript shell as in the JavaScript example or console.log, with a result like this:
```coffeescript
loop
print a = Math.random() * 20 // 1
break if a == 10
print Math.random() * 20 // 1
```
## ColdFusion
```cfm
#randNum#
#RandRange(0, 19)#
```
{{out}}
My first two test outputs (I swear this is true)
6 0
9 6
12 3
6 0
14 10
19 12
18 14
19 8
3 2
19 1
11 12
16 9
11 15
3 19
13 8
6 4
4 4
13 17
16 9
5 12
12 6
4 14
1 10
3 7
11 15
11 8
0 16
16 14
8 14
11 10
8 8
16 11
4 7
19 10
8 2
15 11
18 10
1 2
18 9
4 9
6 6
11 8
14 6
17 15
13 2
2 0
2 17
8 17
18 13
11 5
15 18
17 8
15 3
7 17
7 13
15 14
11 9
10
```
```txt
10
```
## Common Lisp
```lisp
(loop for a = (random 20)
do (print a)
until (= a 10)
do (print (random 20)))
```
## D
```d
import std.stdio, std.random;
void main() {
while (true) {
int r = uniform(0, 20);
write(r, " ");
if (r == 10)
break;
write(uniform(0, 20), " ");
}
}
```
{{out}}
```txt
2 4 9 5 3 7 4 4 14 14 3 7 13 8 13 6 10
```
## dc
{{trans|bc}}
```dc
1 ss [s = seed of the random number generator]sz
0k [scale = 0]sz
[Function r: Push a random number from 0 to 20.]sz
[
[2Q]SA
[
[Formula (from POSIX) for random numbers of low quality.]sz
ls 1103515245 * 12345 + 4294967296 % d ss [Compute next s]sz
65536 / [it = s / 65536]sz
d 16 !>A [Break loop if 16 <= it]sz
sz 0 0 =B [Forget it, continue loop]sz
]SB 0 0 =B
20 % [Push it % 20]sz
LA sz LB sz [Restore A, B]sz
]sr
[2Q]sA
[
0 0 =r p [Print 1st number.]sz
10 =A [Break if 10 == it.]sz
0 0 =r p sz [Print 2nd number.]sz
0 0 =B [Continue loop.]sz
]sB 0 0 =B
```
## Delphi
```Delphi
program Project5;
{$APPTYPE CONSOLE}
var
num:Integer;
begin
Randomize;
while true do
begin
num:=Random(20);
Writeln(num);
if num=10 then break;
end;
end.
```
## DWScript
```delphi
while True do begin
var num := RandomInt(20);
PrintLn(num);
if num=10 then Break;
end;
```
## E
```e
while (true) {
def a := entropy.nextInt(20)
print(a)
if (a == 10) {
println()
break
}
println(" ", entropy.nextInt(20))
}
```
## EasyLang
repeat
a = random 20
print a
until a = 10
print random 20
.
```
## Ela
This implementation uses .NET Framework Math.Randomize function.
Current ticks multiplied by an iteration index are used as a seed.
As a result, an output looks almost truly random:
```ela
open datetime random monad io
loop = loop' 1
where loop' n t = do
dt <- datetime.now
seed <- return <| toInt <| (ticks <| dt) * n
r <- return $ rnd seed 0 19
putStrLn (show r)
if r <> t then loop' (n + 1) t else return ()
loop 10 ::: IO
```
## Elixir
{{works with|Elixir|1.2}}
```elixir
defmodule Loops do
def break, do: break(random)
defp break(10), do: IO.puts 10
defp break(r) do
IO.puts "#{r},\t#{random}"
break(random)
end
defp random, do: Enum.random(0..19)
end
Loops.break
```
{{out}}
```txt
13, 7
12, 7
2, 16
3, 19
17, 10
5, 17
14, 0
7, 6
5, 19
5, 12
4, 2
8, 14
1, 17
13, 5
10
```
## Erlang
```erlang
%% Implemented by Arjun Sunel
-module(forever).
-export([main/0, for/0]).
main() ->
for().
for() ->
K = random:uniform(19),
io:fwrite( "~p ", [K] ),
if K==10 ->
ok;
true ->
M = random:uniform(19),
io:format("~p~n",[M]),
for()
end.
```
## ERRE
```ERRE
LOOP
A=INT(RND(1)*20)
PRINT(A)
IF A=10 THEN EXIT LOOP END IF !EXIT FOR works the same inside FOR loops
PRINT(INT(RND(1)*20))
END LOOP
```
The RND(X) function returns a random integer from 0 to 1. X is a dummy argument.
## Euphoria
```euphoria
integer i
while 1 do
i = rand(20) - 1
printf(1, "%g ", {i})
if i = 10 then
exit
end if
printf(1, "%g ", {rand(20)-1})
end while
```
The rand() function returns a random integer from 1 to the integer provided.
## F#
```F#
let mutable a=21
let mutable b=22
let mutable c=23
while(a<>10) do
b <- (new System.Random()).Next(0, 20)
if(a<>b) then
printf "%i " b
c <- (new System.Random(b)).Next(0, 20)
if(b<>10) then
if(a<>b) then
printfn "%i " c
a<-b
```
## Factor
Using with-return:
```factor
[
[ 20 random [ . ] [ 10 = [ return ] when ] bi 20 random . t ] loop
] with-return
```
Idiomatic Factor:
```factor
[ 20 random [ . ] [ 10 = not ] bi dup [ 20 random . ] when ] loop
```
## Fantom
```fantom
class ForBreak
{
public static Void main ()
{
while (true)
{
a := Int.random(0..19)
echo (a)
if (a == 10) break
echo (Int.random(0..19))
}
}
}
```
## Forth
```forth
include random.fs
: main
begin 20 random dup . 10 <>
while 20 random .
repeat ;
\ use LEAVE to break out of a counted loop
: main
100 0 do
i random dup .
10 = if leave then
i random .
loop ;
```
## Fortran
{{works with|Fortran|90 and later}}
```fortran
program Example
implicit none
real :: r
integer :: a, b
do
call random_number(r)
a = int(r * 20)
write(*,*) a
if (a == 10) exit
call random_number(r)
b = int(r * 20)
write(*,*) b
end do
end program Example
```
{{works with|Fortran|77 and later}}
```fortran
PROGRAM LOOPBREAK
INTEGER I, RNDINT
C It doesn't matter what number you put here.
CALL SDRAND(123)
C Because FORTRAN 77 semantically lacks many loop structures, we
C have to use GOTO statements to do the same thing.
10 CONTINUE
C Print a random number.
I = RNDINT(0, 19)
WRITE (*,*) I
C If the random number is ten, break (i.e. skip to after the end
C of the "loop").
IF (I .EQ. 10) GOTO 20
C Otherwise, print a second random number.
I = RNDINT(0, 19)
WRITE (*,*) I
C This is the end of our "loop," meaning we jump back to the
C beginning again.
GOTO 10
20 CONTINUE
STOP
END
C FORTRAN 77 does not come with a random number generator, but it
C is easy enough to type "fortran 77 random number generator" into your
C preferred search engine and to copy and paste what you find. The
C following code is a slightly-modified version of:
C
C http://www.tat.physik.uni-tuebingen.de/
C ~kley/lehre/ftn77/tutorial/subprograms.html
SUBROUTINE SDRAND (IRSEED)
COMMON /SEED/ UTSEED, IRFRST
UTSEED = IRSEED
IRFRST = 0
RETURN
END
INTEGER FUNCTION RNDINT (IFROM, ITO)
INTEGER IFROM, ITO
PARAMETER (MPLIER=16807, MODLUS=2147483647, &
& MOBYMP=127773, MOMDMP=2836)
COMMON /SEED/ UTSEED, IRFRST
INTEGER HVLUE, LVLUE, TESTV, NEXTN
SAVE NEXTN
IF (IRFRST .EQ. 0) THEN
NEXTN = UTSEED
IRFRST = 1
ENDIF
HVLUE = NEXTN / MOBYMP
LVLUE = MOD(NEXTN, MOBYMP)
TESTV = MPLIER*LVLUE - MOMDMP*HVLUE
IF (TESTV .GT. 0) THEN
NEXTN = TESTV
ELSE
NEXTN = TESTV + MODLUS
ENDIF
IF (NEXTN .GE. 0) THEN
RNDINT = MOD(MOD(NEXTN, MODLUS), ITO - IFROM + 1) + IFROM
ELSE
RNDINT = MOD(MOD(NEXTN, MODLUS), ITO - IFROM + 1) + ITO + 1
ENDIF
RETURN
END
```
{{works with|Fortran|66 and earlier}}
Anyone who attempts to produce random numbers via a computation is already in a state of sin, so, one might as well be hung as a goat rather than as a lamb. Here is a version using the RANDU generator, in the style of Fortran 66 as offered by the IBM1130. No logical-if statements and reliance on implicit type declarations. Sixteen-bit integers result. The standard advice is to start IX off as an odd number. Note that RANDU does ''not'' update IX (the "seed"); the caller must do so. Since integer overflow producing negative numbers is undone by adding 32768 (trusting that the compiler will not attempt to combine constants, thus + 32767 + 1) in the absence of an AND operation, possible values for IY are presumably zero to 32767. Since IY is divided by 32767.0 (''not'' 32768.0 for example), the range for YFL is zero to one ''inclusive'', though further inspection shows that zero is not attained for proper starts - should IX be zero it will never change, thus the span is (0,1]; a more common arrangement is [0,1).
Because the upper bound ''is'' attainable, multiplying YFL by 19 and truncating the result will mean that 19 appears only as an edge event when IY = 32767. Multiplying by 20 will ensure that 19 gets its fair share along with each other integer, but, the edge event might now occasionally produce a 20. There is no MIN function available, so, explicit testing results. Rather than repeat this code with its consequent litter of labels, a helper function IR19 does the work once. These out-by-one opportunities are vexing.
The RANDU routine is so notorious that latter-day compilers can supply their own RANDU (using a better method), and further, disregard a user-supplied RANDU routine so it may have to be called RANDUU or some other name!
```Fortran
SUBROUTINE RANDU(IX,IY,YFL)
Copied from the IBM1130 Scientific Subroutines Package (1130-CM-02X): Programmer's Manual, page 60.
CAUTION! This routine's 32-bit variant is reviled by Prof. Knuth and many others for good reason!
IY = IX*899
IF (IY) 5,6,6
5 IY = IY + 32767 + 1
6 YFL = IY
YFL = YFL/32767.
END
FUNCTION IR19(IX)
CALL RANDU(IX,IY,YFL)
IX = IY
I = YFL*20
IF (I - 20) 12,11,11
11 I = 19
12 IR19 = I
END
IX = 1
Commence the loop.
10 I = IR19(IX)
WRITE (6,11) I
11 FORMAT (I3)
IF (I - 10) 12,20,12
12 I = IR19(IX)
WRITE (6,11) I
GO TO 10
Cease.
20 CONTINUE
END
```
Output, converted to along the line:
0 13 4 19 1 7 2 12 4 7 14 11 6 4 0 9 5 12 16 19 18 2 0 13 2 7 10
This source will compile with later compilers (possibly after adding INTEGER*2 declarations to not use larger integers), as well as earlier compilers. But the IBM1620's Fortran II ran on a decimal computer (and the compiler allowed an option to specify how many digits in a number) so the assumption of sixteen-bit two's-complement arithmetic would fail. There was once much more variety in computer design, not just always a power of two in word sizes.
## FreeBASIC
```freebasic
' FB 1.05.0 Win64
Dim i As Integer
Randomize
Do
i = Int(Rnd * 20)
Print Using "##"; i;
Print " ";
If i = 10 Then Exit Do
i = Int(Rnd * 20)
Print Using "##"; i;
Print" ";
Loop
Print
Sleep
```
Sample output
{{out}}
```txt
6 12 2 16 5 19 9 6 16 1 16 10 1 4 18 3 2 9 19 0
19 13 0 0 12 17 13 12 18 10 8 13 9 5 14 7 10
```
## FutureBasic
```futurebasic
include "ConsoleWindow"
randomize
dim as short stopGo, goOn
while ( stopGo != 10 )
stopGo = rnd(19) : print "stopGo ="; stopGo,
goOn = rnd(19) : print "goOn ="; goOn
wend
```
Sample output:
```txt
stopGo = 14 goOn = 17
stopGo = 5 goOn = 8
stopGo = 18 goOn = 1
stopGo = 1 goOn = 11
stopGo = 13 goOn = 3
stopGo = 16 goOn = 6
stopGo = 14 goOn = 4
stopGo = 7 goOn = 17
stopGo = 14 goOn = 9
stopGo = 8 goOn = 2
stopGo = 15 goOn = 19
stopGo = 17 goOn = 2
stopGo = 13 goOn = 13
stopGo = 8 goOn = 1
stopGo = 11 goOn = 19
stopGo = 3 goOn = 4
stopGo = 14 goOn = 2
stopGo = 18 goOn = 7
stopGo = 15 goOn = 17
stopGo = 15 goOn = 15
stopGo = 15 goOn = 8
stopGo = 12 goOn = 9
stopGo = 2 goOn = 8
stopGo = 12 goOn = 12
stopGo = 10 goOn = 4
```
## Gambas
```gambas
Public Sub Form_Open()
Dim iRand As Integer
Repeat
iRand = Rnd * 20
Print iRand
Until iRand = 10
End
```
## Gambas
'''[https://gambas-playground.proko.eu/?gist=65d2287312298a938e7e8eea8899e38b Click this link to run this code]'''
```gambas
Public Sub Main()
Dim byNo As Byte
Do
byNo = Rand(0, 19)
Print byNo;;
If byNo = 10 Then Break
byNo = Rand(0, 19)
Print byNo;;
Loop
End
```
Output:
```txt
0 5 12 8 1 13 16 5 4 11 5 7 15 12 16 7 9 10 13 19 4 10 2 13 16 7 0 1 16 3 17 10 0 16 14 0 0 8 6 2 1 5 9 12 2 18 15 1 1 17 9 18 8 17 19 12 6 19 9 5 15 1 2 7 2 11 18 1 15 19 10
```
## GAP
```gap
while true do
a := Random(0, 19);
Print(a);
if a = 10 then
Print("\n");
break;
fi;
a := Random(0, 19);
Print("\t", a, "\n");
od;
# 11 6
# 5 8
# 1 4
# 5 10
# 1 16
# 10
```
## GML
```GML
while(1)
{
a = floor(random(19))
show_message(string(a))
if(a = 10)
break
b = floor(random(19))
show_message(string(a))
}
```
## Go
```go
package main
import "fmt"
import "math/rand"
import "time"
func main() {
rand.Seed(time.Now().UnixNano())
for {
a := rand.Intn(20)
fmt.Println(a)
if a == 10 {
break
}
b := rand.Intn(20)
fmt.Println(b)
}
}
```
## Groovy
```groovy
final random = new Random()
while (true) {
def random1 = random.nextInt(20)
print random1
if (random1 == 10) break
print ' '
println random.nextInt(20)
}
```
=={{header|GW-BASIC}}==
```qbasic
10 NUM = 0
20 WHILE NUM <> 10
30 NUM = INT(RND * 20)
40 PRINT NUM
50 WEND
```
## Harbour
```visualfoxpro
PROCEDURE Loop()
LOCAL n
DO WHILE .T.
? n := hb_RandomInt( 0, 19 )
IF n == 10
EXIT
ENDIF
? hb_RandomInt( 0, 19 )
ENDDO
RETURN
```
## Haskell
```haskell
import Control.Monad
import System.Random
loopBreak n k = do
r <- randomRIO (0,n)
print r
unless (r==k) $ do
print =<< randomRIO (0,n)
loopBreak n k
```
Use:
```haskell>loopBreak 19 10 main procedure to set the random number seed based on the time of day.
## Io
```io
loop(
a := Random value(0,20) floor
write(a)
if( a == 10, writeln ; break)
b := Random value(0,20) floor
writeln(" ",b)
)
```
## J
```j
loopexample=: verb define
while. 1 do.
smoutput n=. ?20
if. 10=n do. return. end.
smoutput ?20
end.
)
```
Note that break. could have been used in place of return..
## Java
```java
import java.util.Random;
Random rand = new Random();
while(true){
int a = rand.nextInt(20);
System.out.println(a);
if(a == 10) break;
int b = rand.nextInt(20);
System.out.println(b);
}
```
## JavaScript
```javascript
for (;;) {
var a = Math.floor(Math.random() * 20);
print(a);
if (a == 10)
break;
a = Math.floor(Math.random() * 20);
print(a);
}
```
The print() function is available in the [[Rhino]] JavaScript shell.
If we step back for a moment from imperative assumptions about repetitive processes and their interruption, we may notice that there is actually no necessary connection between repetitive process and loops.
In a functional idiom of JavaScript, we might instead write something like:
```JavaScript
(function streamTillInitialTen() {
var nFirst = Math.floor(Math.random() * 20);
console.log(nFirst);
if (nFirst === 10) return true;
console.log(
Math.floor(Math.random() * 20)
);
return streamTillInitialTen();
})();
```
Obtaining runs like:
```txt
18
10
16
10
8
0
13
3
2
14
15
17
14
7
10
8
0
2
0
2
5
16
3
16
6
7
19
0
16
9
7
11
17
10
```
Though returning a value composes better, and costs less IO traffic, than firing off side-effects from a moving thread:
```JavaScript
console.log(
(function streamTillInitialTen() {
var nFirst = Math.floor(Math.random() * 20);
if (nFirst === 10) return [10];
return [
nFirst,
Math.floor(Math.random() * 20)
].concat(
streamTillInitialTen()
);
})().join('\n')
);
```
Sample result:
```txt
17
14
3
4
13
10
15
5
10
```
## jq
With the functions defined below, the task can be accomplished using the following jq filter:
take( rand(20); . != 10 )
Here, `rand(n)` is a pseudo-random number generator, and `take(stream; cond)` will continue taking from the stream so long as the condition is satisfied. When the condition is no longer satisfied, the PRNG is immediately terminated.
Using the built-in `foreach` construct, the above is equivalent to:
label $done | foreach rand(20) as $n (null; $n; if . == 10 then break $done else . end)
'''PRNG'''
Currently, jq does not have a built-in random-number generator, so here we borrow one of the linear congruential generators defined at https://rosettacode.org/wiki/Linear_congruential_generator -
```jq
# 15-bit integers generated using the same formula as rand()
# from the Microsoft C Runtime.
# Input: [ count, state, rand ]
def next_rand_Microsoft:
.[0] as $count | .[1] as $state
| ( (214013 * $state) + 2531011) % 2147483648 # mod 2^31
| [$count+1 , ., (. / 65536 | floor) ];
def rand_Microsoft(seed):
[0,seed]
| next_rand_Microsoft # the seed is not so random
| recurse( next_rand_Microsoft )
| .[2];
# Generate random integers from 0 to (n-1):
def rand(n): n * (rand_Microsoft(17) / 32768) | trunc;
```
'''"take"'''
```jq
def take(s; cond):
label $done
| foreach s as $n (null; $n; if $n | cond | not then break $done else . end);
```
'''"count"'''
Since the PRNG used here is deterministic, we'll just count the number of integers generated:
```jq
def count(s): reduce s as $i (0; . + 1);
```
'''Example'''
count(take(rand(20); . != 10))
{{out}}
12
## Julia
```Julia
while true
n = rand(0:19)
@printf "%4d" n
if n == 10
println()
break
end
n = rand(0:19)
@printf "%4d\n" n
end
```
{{out}}
```txt
0 11
11 7
4 19
7 19
5 2
5 17
12 5
14 18
1 10
18 14
16 0
17 1
10
```
## Kotlin
{{trans|Java}}
```scala
import java.util.Random
fun main(args: Array) {
val rand = Random()
while (true) {
val a = rand.nextInt(20)
println(a)
if (a == 10) break
println(rand.nextInt(20))
}
}
```
## Lang5
```lang5>do 20 ? int dup . 10 == if break then 20 ? int . loop {^
#x = integer_random(19,0)
#x
#x == 10 ? loop_abort
', '+integer_random(19,0)+'\r'
^}
```
## Liberty BASIC
The task specifies a "number".
```lb>while num<
10
num=rnd(1)*20
print num
if num=10 then exit while
print rnd(1)*20
wend
```
If "integer" was meant, this code fulfils that requirement.
```lb>while num<
10
num=int(rnd(1)*20)
print num
if num=10 then exit while
print int(rnd(1)*20)
wend
```
## Lingo
```lingo
repeat while TRUE
n = random(20)-1
put n
if n = 10 then exit repeat
put random(20)-1
end repeat
```
## Lisaac
```Lisaac
Section Header
+ name := TEST_LOOP_BREAK;
Section Public
- main <- (
+ a, b : INTEGER;
`srand(time(NULL))`;
{
a := `rand()`:INTEGER % 20; // not exactly uniformly distributed, but doesn't matter
a.print;
'\n'.print;
a == 10
}.until_do {
b := `rand()`:INTEGER % 20; // not exactly uniformly distributed, but doesn't matter
b.print;
'\n'.print;
}
);
```
## LiveCode
```LiveCode
command loopForeverRandom
repeat forever
put random(20) - 1 into tRand
put tRand
if tRand is 10 then exit repeat
put random(20) - 1
end repeat
end loopForeverRandom
```
## Lua
```lua
repeat
k = math.random(19)
print(k)
if k == 10 then break end
print(math.random(19)
until false
```
## M2000 Interpreter
We use block of module to loop. Break also can be used, but breaks nested blocks (without crossing modules/functions). Using break in second Checkit module we break three blocks.
```M2000 Interpreter
Module Checkit {
M=Random(0, 19)
Print M
If M=10 then Continue ' because loop flag is false, continue act as Exit
Print Random(0, 19)
loop
}
Checkit
Module Checkit {
do {
do {
{
M=Random(0, 19)
Print M
If M=10 then Break
Print Random(0, 19)
loop
}
Print "no print this"
} always
Print "no print this"
} always
Print "print ok"
}
Checkit
```
## M4
```M4
define(`randSeed',141592653)dnl
define(`setRand',
`define(`randSeed',ifelse(eval($1<10000),1,`eval(20000-$1)',`$1'))')dnl
define(`rand_t',`eval(randSeed^(randSeed>>13))')dnl
define(`random',
`define(`randSeed',eval((rand_t^(rand_t<<18))&0x7fffffff))randSeed')dnl
dnl
define(`loopbreak',`define(`a',eval(random%20))`a='a
ifelse(a,10,`',`define(`b',eval(random%20))`b='b
loopbreak')')dnl
dnl
loopbreak
```
{{out}}
```txt
a=17
b=3
a=0
b=15
a=10
```
## Maple
```Maple
r := rand( 0 .. 19 ):
do
n := r();
printf( "%d\n", n );
if n = 10 then
break
end if;
printf( "%d\n", r() );
end do:
```
## Mathematica
```Mathematica
While[(Print[#];#!=10)&[RandomIntger[{0,19}]],
Print[RandomInteger[{0,19}]
]
```
## Maxima
```maxima
/* To exit the innermost block, use return() */
block([n],
do (
n: random(20),
ldisp(n),
if n = 10 then return(),
n: random(20),
ldisp(n)
)
)$
/* To exit any level of block, use catch(...) and throw();
they are not used for catching exceptions, but for non-local
return. Use errcatch(...) for exceptions. */
block([n],
catch(
do (
n: random(20),
ldisp(n),
if n = 10 then throw('done),
n: random(20),
ldisp(n)
)
)
)$
/* There is also break(, ...) in Maxima. It makes Maxima
stop the evaluation and enter a read-eval loop where one can change
variable values, then return to the function after exit; For example */
block([x: 1], break(), ldisp(x));
> x: 2;
> exit;
2
```
## MAXScript
```MAXScript
while true do
(
a = random 0 19
format ("A: % \n") a
if a == 10 do exit
b = random 0 19
format ("B: % \n") b
)
```
=={{header|МК-61/52}}==
СЧ 2 0 * П0
1 0 - [x] x#0 18
СЧ 2 0 * П1
БП 00 ИП0 С/П
```
=={{header|Modula-3}}==
```modula3
MODULE Break EXPORTS Main;
IMPORT IO, Fmt, Random;
VAR a,b: INTEGER;
BEGIN
WITH rand = NEW(Random.Default).init() DO
LOOP
a := rand.integer(min := 0, max := 19);
IO.Put(Fmt.Int(a) & "\n");
IF a = 10 THEN EXIT END;
b := rand.integer(min := 0, max := 19);
IO.Put(Fmt.Int(b) & "\n");
END;
END;
END Break.
```
## MOO
```moo
while (1)
a = random(20) - 1;
player:tell(a);
if (a == 10)
break;
endif
b = random(20) - 1;
player:tell(b);
endwhile
```
## MUMPS
```MUMPS
BREAKLOOP
NEW A,B
SET A=""
FOR Q:A=10 DO
.SET A=$RANDOM(20)
.WRITE !,A
.Q:A=10
.SET B=$RANDOM(20)
.WRITE ?6,B
KILL A,B
QUIT
;A denser version that doesn't require two tests
NEW A,B
FOR SET A=$RANDOM(20) WRITE !,A QUIT:A=10 SET B=$RANDOM(20) WRITE ?6,B
KILL A,B QUIT
```
{{out}}
```txt
USER>D BREAKLOOP^ROSETTA
5 3
9 13
3 12
9 19
16 4
11 17
18 2
4 18
10
USER>D BREAKLOOP+11^ROSETTA
6 13
15 3
0 8
8 18
7 13
15 10
15 13
10
```
## Neko
```ActionScript
/**
Loops/Break in Neko
Tectonics:
nekoc loops-break.neko
neko loops-break
*/
var random_new = $loader.loadprim("std@random_new", 0);
var random_int = $loader.loadprim("std@random_int", 2);
var random = random_new();
while true {
var r = random_int(random, 20);
$print(r, " ");
if r == 10 break;
r = random_int(random, 20);
$print(r, " ");
}
$print("\n");
```
{{out}}
```txt
prompt$ nekoc loops-break.neko
prompt$ neko loops-break
0 8 17 12 4 18 7 6 19 11 13 6 12 7 6 6 6 18 14 7 18 10 15 6 9 5 4 14 10
```
## Nemerle
{{trans|C#}}
```Nemerle
using System;
using System.Console;
using Nemerle.Imperative;
module Break
{
Main() : void
{
def rnd = Random();
while (true)
{
def a = rnd.Next(20);
WriteLine(a);
when (a == 10) break;
def b = rnd.Next(20);
WriteLine(b);
}
}
}
```
## NetRexx
```NetRexx
/* NetRexx */
options replace format comments java crossref savelog symbols nobinary
say
say 'Loops/Break'
rn = Rexx
rnd = Random()
loop label lb forever
rn = rnd.nextInt(19)
say rn.right(3)'\-'
if rn = 10 then leave lb
rn = rnd.nextInt(19)
say rn.right(3)'\-'
end lb
say
```
## NewLISP
```NewLISP
(until (= 10 (println (rand 20)))
(println (rand 20)))
```
## Nim
{{trans|Python}}
```nim
import math
while true:
let a = random(20)
echo a
if a == 10:
break
let b = random(20)
echo b
```
=={{header|NS-HUBASIC}}==
10 I=RND(20)
20 PRINT I
30 IF I=10 THEN STOP
40 PRINT RND(20)
50 GOTO 10
```
=={{header|Oberon-2}}==
Works with oo2c Version 2
```oberon2
MODULE LoopBreak;
IMPORT
RandomNumbers,
Out;
PROCEDURE Do();
VAR
rn: LONGINT;
BEGIN
LOOP
rn := RandomNumbers.RND(20);
Out.LongInt(rn,0);Out.Ln;
IF rn = 10 THEN EXIT END;
rn := RandomNumbers.RND(20);
Out.LongInt(rn,0);Out.Ln
END
END Do;
BEGIN
Do
END LoopBreak.
```
## Objeck
```objeck
while(true) {
a := (Float->Random() * 20.0)->As(Int);
a->PrintLine();
if(a = 10) {
break;
};
a := (Float->Random() * 20.0)->As(Int);
a->PrintLine();
}
```
## OCaml
```ocaml
# Random.self_init();;
- : unit = ()
# while true do
let a = Random.int 20 in
print_int a;
print_newline();
if a = 10 then raise Exit;
let b = Random.int 20 in
print_int b;
print_newline()
done;;
15
18
2
13
10
Exception: Pervasives.Exit.
```
## Octave
```octave
while(1)
a = floor(unifrnd(0,20, 1));
disp(a)
if ( a == 10 )
break
endif
b = floor(unifrnd(0,20, 1));
disp(b)
endwhile
```
## Oforth
```Oforth
while(true) [
19 rand dup print ":" print
10 == ifTrue: [ break ]
19 rand print " " print
]
```
## Ol
```scheme
(import (otus random!))
(call/cc (lambda (break)
(let loop ()
(if (= (rand! 20) 10)
(break #t))
(print (rand! 20))
(loop))))
```
## ooRexx
```ooRexx
/*REXX ****************************************************************
* Three Ways to leave a Loop
* ooRexx added the possibility to leave an outer loop
* without using a control variable
* 12.05.2013 Walter Pachl
**********************************************************************/
do i1=1 To 2 /* an outer loop */
Say 'i1='i1 /* tell where we are */
Call random ,,123 /* seed to be reproducable */
do forever /* inner loop */
a=random(19)
Say a
if a=6 then leave /* leaces the innermost loop */
end
end
do i2=1 To 2
Say 'i2='i2
Call random ,,123
do forever
a=random(19)
Say a
if a=6 then leave i2 /* leaves loop with control variable i2 */
end
end
Parse Version v
Select
When pos('ooRexx',v)>0 Then supported=1
Otherwise supported=0
End
If supported Then Do
Say 'Leave label-name is supported in' v
do Label i3 Forever
Say 'outer loop'
Call random ,,123
do forever
a=random(19)
Say a
if a=6 then leave i3 /* leaves loop with label name i3 */
end
end
End
Else
Say 'Leave label-name is probably not supported in' v
```
{{out}}
```txt
i1=1
14
14
5
6
i1=2
14
14
5
6
i2=1
14
14
5
6
Leave label-name is supported in REXX-ooRexx_4.1.2(MT) 6.03 28 Aug 2012
outer loop
14
14
5
6
```
## Oz
We can implement this either with recursion or with a special type of the for-loop. Both can be considered idiomatic.
```oz
for break:Break do
R = {OS.rand} mod 20
in
{Show R}
if R == 10 then {Break}
else {Show {OS.rand} mod 20}
end
end
```
## PARI/GP
```parigp
while(1,
t=random(20);
print(t);
if(t==10, break);
print(random(20))
)
```
## Pascal
See [[Loops/Break#Delphi | Delphi]]
## Perl
```perl
while (1) {
my $a = int(rand(20));
print "$a\n";
if ($a == 10) {
last;
}
my $b = int(rand(20));
print "$b\n";
}
```
## Perl 6
{{works with|Rakudo|#21 "Seattle"}}
```perl6
loop {
say my $n = (0..19).pick;
last if $n == 10;
say (0..19).pick;
}
```
## Phix
{{Trans|Euphoria}}
The rand() function returns a random integer from 1 to the integer provided.
```Phix
integer i
while 1 do
i = rand(20)-1
printf(1, "%g ", {i})
if i=10 then exit end if
printf(1, "%g\n", {rand(20)-1})
end while
```
{{out}}
```txt
2 10
1 7
3 16
10
```
## PHP
```php
while (true) {
$a = rand(0,19);
echo "$a\n";
if ($a == 10)
break;
$b = rand(0,19);
echo "$b\n";
}
```
## PicoLisp
Literally:
```PicoLisp
(use R
(loop
(println (setq R (rand 1 19)))
(T (= 10 R))
(println (rand 1 19)) ) )
```
Shorter:
```PicoLisp
(until (= 10 (println (rand 1 19)))
(println (rand 1 19)) )
```
## Pike
```pike
int main(){
while(1){
int a = random(20);
write(a + "\n");
if(a == 10){
break;
}
int b = random(20);
write(b + "\n");
}
}
```
## PL/I
```PL/I
do forever;
k = trunc(random()*20);
put (k);
if k = 10 then leave;
k = trunc(random()*20);
put skip list (k);
end;
```
## PostScript
```postscript
realtime srand % init RNG
{
rand 20 mod % generate number between 0 and 19
dup = % print it
10 eq { exit } if % exit if 10
} loop
```
## PowerShell
```powershell
$r = New-Object Random
for () {
$n = $r.Next(20)
Write-Host $n
if ($n -eq 10) {
break
}
Write-Host $r.Next(20)
}
```
## PureBasic
```PureBasic
If OpenConsole()
Repeat
a = Random(19)
PrintN(Str(a))
If a = 10
Break
EndIf
b = Random(19)
PrintN(Str(b))
PrintN("")
ForEver
Print(#CRLF$ + #CRLF$ + "Press ENTER to exit")
Input()
CloseConsole()
EndIf
```
## Python
```python
from random import randrange
while True:
a = randrange(20)
print(a)
if a == 10:
break
b = randrange(20)
print(b)
```
## R
{{works with|R|2.8.1}}
```R
sample0to19 <- function() sample(0L:19L, 1,replace=TRUE)
repeat
{
result1 <- sample0to19()
if (result1 == 10L)
{
print(result1)
break
}
result2 <- sample0to19()
cat(result1, result2, "\n")
}
```
## Qi
```qi
(define loop -> (if (= 10 (PRINT (random 20)))
true
(do (PRINT (random 20))
(loop))))
(loop)
```
## Racket
```racket
#lang racket
(let loop ()
(let/ec break
(define a (random 20))
(displayln a)
(when (= a 10) (break))
(displayln (random 20))
(loop)))
```
## REBOL
```REBOL
REBOL [
Title: "Loop/Break"
URL: http://rosettacode.org/wiki/Loop/Break
]
random/seed 1 ; Make repeatable.
; random/seed now ; Uncomment for 'true' randomness.
r20: does [(random 20) - 1]
forever [
prin x: r20
if 10 = x [break]
print rejoin [" " r20]
]
print ""
```
{{out}}
```txt
14 11
19 15
6 11
12 11
3 14
10
```
## Retro
```Retro
doc{
A couple of helper functions to make the rest of the
code more readable.
}doc
: rand ( -n ) random 20 mod ;
: . ( n- ) putn space ;
doc{
One approach is to use a simple repeat/again loop, and
a conditional exit. For instance:
}doc
: foo ( - )
repeat rand dup . 10 = if; rand . again ;
doc{
The other approach uses a structured while loop with the
second printing handled by a conditional clause.
}doc
[ rand dup . 10 <> [ [ rand . ] ifTrue ] sip ] while
```
## REXX
```rexx
/*REXX program demonstrates a FOREVER DO loop with a test to LEAVE (break). */
/*REXX's RANDOM BIF returns an integer.*/
do forever /*perform loop until da cows come home.*/
a=random(19) /*same as: random(0, 19) */
call charout , right(a, 5) /*show A right─justified, column 1.*/
if a==10 then leave /*is random #=10? Then cows came home.*/
b=random(19) /*same as: random(0, 19) */
say right(b, 5) /*show B right─justified, column 2.*/
end /*forever*/ /* [↑] CHAROUT , xxx writes to term.*/
/*stick a fork in it, we're all done. */
```
{{out|output}}
(A long run was chosen)
```txt
1 0
16 3
8 15
11 8
12 14
15 4
0 0
6 11
15 5
14 0
18 16
15 0
14 5
3 5
9 4
4 4
17 6
4 10
6 2
9 13
12 6
14 16
17 0
8 6
9 2
0 6
9 9
12 8
11 3
11 4
7 1
3 13
4 8
14 14
14 13
12 7
1 0
16 15
8 19
12 7
18 9
7 18
19 13
6 2
6 7
2 1
8 2
9 7
6 13
19 15
10
```
## Ring
```ring
while true
a = random(20)
see a + nl
if a = 10 exit ok
end
```
## Ruby
```ruby
loop do
a = rand(20)
print a
if a == 10
puts
break
end
b = rand(20)
puts "\t#{b}"
end
```
or
```ruby
loop do
print a = rand(20)
puts or break if a == 10
puts "\t#{rand(20)}"
end
```
{{out}}
```txt
0 4
11 0
8 2
12 13
3 0
6 9
2 8
12 10
8 17
12 6
10
```
## Rust
{{libheader|rand}}
```rust
// cargo-deps: rand
extern crate rand;
use rand::{thread_rng, Rng};
fn main() {
let mut rng = thread_rng();
loop {
let num = rng.gen_range(0, 20);
if num == 10 {
println!("{}", num);
break;
}
println!("{}", rng.gen_range(0, 20));
}
}
```
## SAS
```sas
data _null_;
do while(1);
n=floor(uniform(0)*20);
put n;
if n=10 then leave; /* 'leave' to break a loop */
end;
run;
```
## Sather
```sather
-- help class for random number sequence
class RANDOM is
attr seed:INT;
create(seed:INT):SAME is
res:RANDOM := new;
res.seed := seed;
return res;
end;
-- this code is taken from rand's man (C)
next:INT is
seed := seed * 1103515245 + 12345;
return (seed/65536) % 32768;
end;
end;
class MAIN is
main is
a, b :INT;
rnd:RANDOM := #(1);
loop
a := rnd.next % 20;
#OUT + a + "\n";
if a = 10 then break!; end; -- here we break
b := rnd.next % 20;
#OUT + b + "\n";
end;
end;
end;
```
## Scala
```scala>scala
import util.control.Breaks.{breakable, break}
import util.control.Breaks.{breakable, break}
scala> import util.Random
import util.Random
scala> breakable {
| while(true) {
| val a = Random.nextInt(20)
| println(a)
| if(a == 10)
| break
| val b = Random.nextInt(20)
| println(b)
| }
| }
5
4
10
```
## Scheme
```scheme
(let loop ((first (random 20)))
(print first)
(if (not (= first 10))
(begin
(print (random 20))
(loop (random 20)))))
```
Or by using call/cc to break out:
```scheme
(call/cc
(lambda (break)
(let loop ((first (random 20)))
(print first)
(if (= first 10)
(break))
(print (random 20))
(loop (random 20)))))
```
## Scilab
{{works with|Scilab|5.5.1}}
while %T
a=int(rand()*20) // [0..19]
printf("%2d ",a)
if a==10 then break; end
b=int(rand()*20)
printf("%2d\n",b)
end
printf("\n")
```
{{out}}
4 15
0 6
13 12
16 13
17 1
11 13
14 3
10
```
## Sidef
```ruby
var lim = 20;
loop {
say (var n = lim.rand.int);
n == 10 && break;
say lim.rand.int;
}
```
## Simula
{{works with|SIMULA-67}}
```simula
! Loops/Break - simula67 - 08/03/2017;
begin
integer num,seed;
seed:=0;
while true do
begin
num:=randint(1,20,seed);
outint(num,2); outimage;
if num=10 then goto lab;
end;
lab:
end
```
{{out}}
```txt
1
9
8
10
```
## Smalltalk
{{works with|Smalltalk/X}}
```smalltalk
[
|a b done|
a := Random nextIntegerBetween:0 and:19.
Stdout print: a; cr.
(done := (a == 10)) ifFalse:[
b := Random nextIntegerBetween:0 and:19.
Stdout print:' '; print: b; cr.
].
done
] whileFalse
```
alternative:
```smalltalk
[:exit |
|first|
Stdout printCR: (first := Random nextIntegerBetween:0 and:19).
first == 10 ifTrue:[ exit value:nil ].
Stdout print:' '; printCR: (Random nextIntegerBetween:0 and:19).
] loopWithExit.
```
## Snabel
Uses a ranged random generator as iterator.
```snabel
let: rnd 19 random;
@rnd {
$ str say
10 = &break when
@rnd pop str say
} for
```
## SNOBOL4
Most Snobols lack a built-in rand( ) function. Kludgy "Linux-only" implementation:
```snobol
input(.random,io_findunit(),1,"/dev/urandom")
while &ALPHABET random @rand
output = rand = rand - (rand / 20) * 20
eq(rand,10) :f(while)
end
```
Or using a library function:
```SNOBOL4
* rand(n) -> real x | 0 <= x < n
-include 'random.sno'
loop ne(output = convert(rand(20)'integer'),10) :s(loop)
end
```
## Spin
{{works with|BST/BSTC}}
{{works with|FastSpin/FlexSpin}}
{{works with|HomeSpun}}
{{works with|OpenSpin}}
```spin
con
_clkmode = xtal1 + pll16x
_clkfreq = 80_000_000
obj
ser : "FullDuplexSerial.spin"
pub main | r, s
ser.start(31, 30, 0, 115200)
s := 1337 ' PRNG seed
repeat
r := ||?s // 20
ser.dec(r)
ser.tx(32)
if r == 10
quit
r := ||?s // 20
ser.dec(r)
ser.tx(32)
waitcnt(_clkfreq + cnt)
ser.stop
cogstop(0)
```
{{out}}
```txt
8 13 1 7 19 1 15 16 9 6 5 9 1 15 5 0 6 3 9 19 8 9 10
```
## SPL
Direct approach:
```spl>
n = #.rnd(20)
#.output(n)
<< n=10
n = #.rnd(20)
#.output(n)
<
```
With reusable code:
```spl>
:1
n = #.rnd(20)
#.output(n)
<-
<< n=10
1 <->
<
```
## SQL PL
{{works with|Db2 LUW}} version 9.7 or higher.
With SQL PL:
```sql pl
--#SET TERMINATOR @
SET SERVEROUTPUT ON@
BEGIN
DECLARE VAL INTEGER;
LOOP: WHILE (TRUE = TRUE) DO
SET VAL = INTEGER(RAND() * 20);
CALL DBMS_OUTPUT.PUT_LINE(VAL);
IF (VAL = 10) THEN
LEAVE LOOP;
END IF;
SET VAL = INTEGER(RAND() * 20);
CALL DBMS_OUTPUT.PUT_LINE(VAL);
END WHILE LOOP;
END @
```
Output:
```txt
db2 -td@
db2 => SET SERVEROUTPUT ON@
DB20000I The SET SERVEROUTPUT command completed successfully.
db2 => BEGIN
...
db2 (cont.) => END @
DB20000I The SQL command completed successfully.
4
16
9
1
10
```
Since V11.1, the builtin module can be used instead of RAND, like this:
```sql pl
SET VAL = CALL DBMS_RANDOM.VALUE(0,20);
```
## Stata
```stata
while 1 {
local n=runiformint(0,19)
display `n'
if `n'==10 continue, break
display runiformint(0,19)
}
```
### Mata
```stata
for (; 1; ) {
printf("%f\n",n=runiformint(1,1,0,19))
if (n==10) break
printf("%f\n",runiformint(1,1,0,19))
}
```
## Suneido
```Suneido
forever
{
Print(i = Random(20))
if i is 10
break
Print(i = Random(20))
}
```
## Swift
```Swift
while true
{
let a = Int(arc4random()) % (20)
print("a: \(a)",terminator: " ")
if (a == 10)
{
break
}
let b = Int(arc4random()) % (20)
print("b: \(b)")
}
```
{{out}}
```txt
a: 2 b: 7
a: 16 b: 13
a: 18 b: 16
a: 10
```
## Tcl
```tcl
while true {
set a [expr int(20*rand())]
puts $a
if {$a == 10} {
break
}
set b [expr int(20*rand())]
puts $b
}
```
=={{header|TI-89 BASIC}}==
```ti89b
Local x
Loop
rand(20)-1 → x
Disp x © new line and text
If x = 10 Then
Exit
EndIf
Output 64, 50, rand(20)-1 © paint text to the right on same line
EndLoop
```
=={{header|Transact-SQL}}==
DECLARE @i INT;
WHILE 1=1
BEGIN
SET @i = ABS(CHECKSUM(NewId())) % 20;
PRINT @i;
IF @i=10 BREAK;
PRINT ABS(CHECKSUM(NewId())) % 20;
END;
```
## TorqueScript
```Torque
for(%a = 0; %a > -1; %a++)
{
%number = getRandom(0, 19);
if(%number == 10)
break;
}
```
## TUSCRIPT
```tuscript
$$ MODE TUSCRIPT
LOOP
a=RANDOM_NUMBERS (0,19,1)
IF (10==a) THEN
PRINT "a=",a
STOP
ELSE
b=RANDOM_NUMBERS (0,19,1)
PRINT "a=",a," b=",b
ENDIF
IF (10==a,b) STOP
ENDLOOP
```
{{out}}
```txt
a=0 b=17
a=11 b=13
a=3 b=16
a=17 b=13
a=8 b=11
a=8 b=0
a=6 b=2
a=10
```
## uBasic/4tH
Do
n = RND(20)
Print n
Until n = 10
Print RND(20)
Loop
```
## UNIX Shell
This script gets random numbers from jot(1).
If there is any error with jot(1), the script exits.
{{works with|Bourne Shell}}
{{libheader|jot}}
```bash
while true; do
a=`jot -w %d -r 1 0 20` || exit $?
echo $a
test 10 -eq $a && break
b=`jot -w %d -r 1 0 20` || exit $?
echo $b
done
```
Korn Shells have a RANDOM parameter.
{{works with|Bash}}
{{works with|pdksh|5.2.14}}
```bash
while true; do
echo $((a=RANDOM%20))
[ $a -eq 10 ] && break
echo $((b=RANDOM%20))
done
```
## Ursa
{{trans|Python}}
```ursa
decl ursa.util.random r
decl int a b
while true
set a (r.getint 19)
out a endl console
if (= a 10)
break
end while
set b (r.getint 19)
out b endl console
end while
```
## VBA
```VB
Public Sub LoopsBreak()
Dim value As Integer
Randomize
Do While True
value = Int(20 * Rnd)
Debug.Print value
If value = 10 Then Exit Do
Debug.Print Int(20 * Rnd)
Loop
End Sub
```
## VBScript
Based on BASIC version. Demonstrates breaking out of Do/Loop and For/Next (Exit is good for getting out of functions and subs as well).
```vb
Dim a, b, i
Do
a = Int(Rnd * 20)
WScript.StdOut.Write a
If a = 10 Then Exit Do
b = Int(Rnd * 20)
WScript.Echo vbNullString, b
Loop
For i = 1 To 100000
a = Int(Rnd * 20)
WScript.StdOut.Write a
If a = 10 Then Exit For
b = Int(Rnd * 20)
WScript.Echo vbNullString, b
Next
```
## Visual Basic .NET
{{trans|C#}}
```vbnet
Module Program
Sub Main()
' Initialize with seed 0 to get deterministic output (may vary across .NET versions, though).
Dim rand As New Random(0)
Do
Dim first = rand.Next(20) ' Upper bound is exclusive.
Console.Write(first & " ")
If first = 10 Then Exit Do
Dim second = rand.Next(20)
Console.Write(second & " ")
Loop
End Sub
End Module
```
{{out}}
```txt
14 16 15 11 4 11 18 8 19 5 5 9 12 9 19 0 17 19 13 6 16 16 19 0 13 10 18 13 10
```
## XPL0
```XPL0
include c:\cxpl\codes;
int N;
loop [N:= Ran(20);
IntOut(0, N);
if N=10 then quit;
ChOut(0, 9\tab\);
IntOut(0, Ran(20));
CrLf(0);
]
```
{{out}}
```txt
7 17
13 2
2 10
0 4
2 9
15 15
14 19
10
```
## zkl
```zkl
while(1){n:=(0).random(20); n.print(" ");
if (n==10){ println(); break; } (0).random().println();
}
```
{{out}}
```txt
7 2139341079
4 3217334923
18 2050357211
2 2061361000
10
```
{{omit from|GUISS}}