⚠️ 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:Simple]]
Quite often one needs loops which, in the last iteration, execute only part of the loop body.
;Goal: Demonstrate the best way to do this.
;Task: Write a loop which writes the comma-separated list 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 using separate output statements for the number and the comma from within the body of the loop.
;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]]
- [[Loops/Wrong ranges]]
- [[Loops/Wrong ranges]]
360 Assembly
* Loops/N plus one half 13/08/2015
LOOPHALF CSECT USING LOOPHALF,R12
LR R12,R15
BEGIN LA R3,MVC
SR R5,R5
LA R6,1
LA R7,10
LOOPI BXH R5,R6,ELOOPI for i=1 to 10
XDECO R5,XDEC
MVC 0(4,R3),XDEC+8
LA R3,4(R3)
CH R5,=H'10'
BNL NEXTI
MVC 0(2,R3),=C', '
LA R3,2(R3)
NEXTI B LOOPI next i
ELOOPI XPRNT MVC,80
XR R15,R15
BR R14
MVC DC CL80' '
XDEC DS CL12
YREGS
END LOOPHALF
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
ACL2
ACL2 does not have loops, but this is close:
(defun print-list (xs)
(progn$ (cw "~x0" (first xs))
(if (endp (rest xs))
(cw (coerce '(#\Newline) 'string))
(progn$ (cw ", ")
(print-list (rest xs))))))
Ada
with Ada.Text_IO;
procedure LoopsAndHalf is
begin
for i in 1 .. 10 loop
Ada.Text_IO.put (i'Img);
exit when i = 10;
Ada.Text_IO.put (",");
end loop;
Ada.Text_IO.new_line;
end LoopsAndHalf;
Aime
integer i;
i = 0;
while (1) {
i += 1;
o_integer(i);
if (i == 10) {
break;
}
o_text(", ");
}
o_text("\n");
ALGOL 60
{{works with|ALGOL 60|OS/360}}
'BEGIN'
'COMMENT' Loops N plus one half - Algol60 - 20/06/2018;
'INTEGER' I;
'FOR' I:=1 'STEP' 1 'UNTIL' 10 'DO' 'BEGIN'
OUTINTEGER(1,I);
'IF' I 'NOTEQUAL' 10 'THEN' OUTSTRING(1,'(', ')')
'END'
'END'
{{out}}
+1 , +2 , +3 , +4 , +5 , +6 , +7 , +8 , +9 , +10
ALGOL 68
{{works with|ALGOL 68|Standard - no extensions to language used}} {{works with|ALGOL 68G|Any - tested with release mk15-0.8b.fc9.i386}} {{works with|ELLA ALGOL 68|Any (with appropriate job cards) - tested with release 1.8.8d.fc9.i386}} There are three common ways of achieving n+½ loops: {|border="1" style="border-collapse: collapse;" ||
FOR i WHILE
print(whole(i, -2));
# WHILE # i < 10 DO
print(", ")
OD;
print(new line)
||
FOR i TO 10 DO
print(whole(i, -2));
IF i < 10 THEN
print(", ")
FI
OD;
print(new line)
||
FOR i DO
print(whole(i, -2));
IF i >= 10 THEN GO TO done FI;
print(", ")
OD;
done:
print(new line)
|} Output for all cases above:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
ALGOL W
begin
integer i;
i := 0;
while
begin
i := i + 1;
writeon( i );
i < 10
end
do
begin
writeon( "," )
end
end.
AmigaE
PROC main()
DEF i
FOR i := 1 TO 10
WriteF('\d', i)
EXIT i = 10
WriteF(', ')
ENDFOR
ENDPROC
ARM Assembly
{{works with|as|Raspberry Pi}}
/* ARM assembly Raspberry PI */
/* program loopnplusone.s */
/* Constantes */
.equ STDOUT, 1 @ Linux output console
.equ EXIT, 1 @ Linux syscall
.equ WRITE, 4 @ Linux syscall
/*********************************/
/* Initialized data */
/*********************************/
.data
szMessResult: .ascii "" @ message result
sMessValeur: .fill 11, 1, ' '
szMessComma: .asciz ","
szCarriageReturn: .asciz "\n"
/*********************************/
/* UnInitialized data */
/*********************************/
.bss
/*********************************/
/* code section */
/*********************************/
.text
.global main
main: @ entry of program
mov r4,#1 @ loop counter
1: @ begin loop
mov r0,r4
ldr r1,iAdrsMessValeur @ display value
bl conversion10 @ decimal conversion
ldr r0,iAdrszMessResult
bl affichageMess @ display message
ldr r0,iAdrszMessComma
bl affichageMess @ display comma
add r4,#1 @ increment counter
cmp r4,#10 @ end ?
blt 1b @ no ->begin loop one
mov r0,r4
ldr r1,iAdrsMessValeur @ display value
bl conversion10 @ decimal conversion
ldr r0,iAdrszMessResult
bl affichageMess @ display message
ldr r0,iAdrszCarriageReturn
bl affichageMess @ display return line
100: @ standard end of the program
mov r0, #0 @ return code
mov r7, #EXIT @ request to exit program
svc #0 @ perform the system call
iAdrsMessValeur: .int sMessValeur
iAdrszMessResult: .int szMessResult
iAdrszMessComma: .int szMessComma
iAdrszCarriageReturn: .int szCarriageReturn
/******************************************************************/
/* 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 registers */
bx lr @ return
/******************************************************************/
/* Converting a register to a decimal */
/******************************************************************/
/* r0 contains value and r1 address area */
.equ LGZONECAL, 10
conversion10:
push {r1-r4,lr} @ save registers
mov r3,r1
mov r2,#LGZONECAL
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
@ end replaces digit in front of area
mov r4,#0
2:
ldrb r1,[r3,r2]
strb r1,[r3,r4] @ store in area begin
add r4,#1
add r2,#1 @ previous position
cmp r2,#LGZONECAL @ end
ble 2b @ loop
mov r1,#0 @ final zero
strb r1,[r3,r4]
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 @ return
Arturo
Functional
print $(join $(map $(range 1 10) { toString(&) }) ", ")
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
AutoHotkey
Loop, 9 ; loop 9 times
{
output .= A_Index ; append the index of the current loop to the output var
If (A_Index <> 9) ; if it isn't the 9th iteration of the loop
output .= ", " ; append ", " to the output var
}
MsgBox, %output%
AutoIt
#cs ----------------------------------------------------------------------------
AutoIt Version: 3.3.8.1
Author: Alexander Alvonellos
Script Function:
Output a comma separated list from 1 to 10, and on the tenth iteration of the
output loop, only perform half of the loop.
#ce ----------------------------------------------------------------------------
Func doLoopIterative()
Dim $list = ""
For $i = 1 To 10 Step 1
$list = $list & $i
If($i = 10) Then ExitLoop
$list = $list & ", "
Next
return $list & @CRLF
EndFunc
Func main()
ConsoleWrite(doLoopIterative())
EndFunc
main()
AWK
'''One-liner:'''
$ awk 'BEGIN{for(i=1;i<=10;i++){printf i;if(i<10)printf ", "};print}'
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
'''Readable version:'''
BEGIN {
n=10
for(i=1;i<=n;i++) {
printf i;
if(i<n) printf ", "
}
print
}
Same output.
Axe
For(I,1,10)
Disp I▶Dec
If I=10
Disp i
Else
Disp ","
End
End
BASIC
{{works with|FreeBASIC}}
{{works with|RapidQ}}
DIM i AS Integer
FOR i=1 TO 10
PRINT i;
IF i=10 THEN EXIT FOR
PRINT ", ";
NEXT i
=== {{header|Applesoft BASIC}} === {{works with|Commodore BASIC}} The [[#ZX_Spectrum_Basic|ZX Spectrum Basic]] code will work just fine in Applesoft BASIC. The following is a more structured approach which avoids the use of GOTO.
10 FOR I = 1 TO 10
20 PRINT I;
30 IF I < 10 THEN PRINT ", "; : NEXT I
==={{header|IS-BASIC}}===
=
## Sinclair ZX81 BASIC
=
The [[#ZX_Spectrum_Basic|ZX Spectrum Basic]] program will work on the ZX81. Depending on the context, the programmer's intention may be clearer if we do it all with <code>GOTO</code>s instead of a <code>FOR</code> loop.
```basic
10 LET I=1
20 PRINT I;
30 IF I=10 THEN GOTO 70
40 PRINT ", ";
50 LET I=I+1
60 GOTO 20
=== {{header|ZX Spectrum Basic}} === {{works with|Applesoft BASIC}} {{works with|Commodore BASIC}} To terminate a loop on the ZX Spectrum, set the loop counter to a value that will exit the loop, before jumping to the NEXT statement.
10 FOR i=1 TO 10
20 PRINT i;
30 IF i=10 THEN GOTO 50
40 PRINT ", ";
50 NEXT i
=
BBC BASIC
=
FOR i% = 1 TO 10
PRINT ; i% ;
IF i% <> 10 PRINT ", ";
NEXT
PRINT
bc
{{Works with|GNU bc}}
The print extension is necessary to get the required output.
while (1) {
print ++i
if (i == 10) {
print "\n"
break
}
print ", "
}
Befunge
::.9`#@_" ,",,
This code is a good answer. However, most Befunge implementations print a " " after using . (output number), so this program prints "1 , 2 , 3 ..." with extra spaces. A bypass for this is possible, by adding 48 and printing the ascii character, but does not work with 10::
::68*+,8`#v_" ,",,
@,,,,", 10"<
Bracmat
1:?i
& whl
' ( put$!i
& !i+1:~>10:?i
& put$", "
)
C
{{trans|C++}}
#include <stdio.h>
int main()
{
int i;
for (i = 1; i <= 10; i++) {
printf("%d", i);
printf(i == 10 ? "\n" : ", ");
}
return 0;
}
C++
#include <iostream>
int main()
{
int i;
for (i = 1; i<10 ; i++)
std::cout << i << ", ";
std::cout<<i;
return 0;
}
C#
using System;
class Program
{
static void Main(string[] args)
{
for (int i = 1; ; i++)
{
Console.Write(i);
if (i == 10) break;
Console.Write(", ");
}
Console.WriteLine();
}
}
Chapel
for i in 1..10 do
write(i, if i % 10 > 0 then ", " else "\n")
Clojure
; Functional version
(apply str (interpose ", " (range 1 11)))
; Imperative version
(loop [n 1]
(printf "%d" n)
(if (< n 10)
(do
(print ", ")
(recur (inc n)))))
COBOL
{{works with|OpenCOBOL}}
IDENTIFICATION DIVISION.
PROGRAM-ID. Loop-N-And-Half.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 I PIC 99.
01 List PIC X(45).
PROCEDURE DIVISION.
PERFORM FOREVER
*> The list to display must be built up because using
*> DISPLAY adds an endline at the end automatically.
STRING FUNCTION TRIM(List) " " I INTO List
IF I = 10
EXIT PERFORM
END-IF
STRING FUNCTION TRIM(List) "," INTO List
ADD 1 TO I
END-PERFORM
DISPLAY List
GOBACK
.
Free-form, 'List'-free version, using DISPLAY NO ADVANCING.
IDENTIFICATION DIVISION.
PROGRAM-ID. LOOP-1p5-NOADV.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 I PIC 99 VALUE 1.
01 IDISP PIC Z9.
PROCEDURE DIVISION.
PERFORM FOREVER
MOVE I TO IDISP
DISPLAY FUNCTION TRIM(IDISP) WITH NO ADVANCING
IF I = 10
EXIT PERFORM
END-IF
DISPLAY ", " WITH NO ADVANCING
ADD 1 TO I
END-PERFORM.
STOP RUN.
END-PROGRAM.
Free-form, GO TO, 88-level. Paragraphs in PROCEDURE DIVISION.
IDENTIFICATION DIVISION.
PROGRAM-ID. LOOP-1p5-NOADV-GOTO.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 I PIC 99 VALUE 1.
88 END-LIST VALUE 10.
01 I-OUT PIC Z9.
PROCEDURE DIVISION.
01-LOOP.
MOVE I TO I-OUT.
DISPLAY FUNCTION TRIM(I-OUT) WITH NO ADVANCING.
IF END-LIST GO TO 02-DONE.
DISPLAY ", " WITH NO ADVANCING.
ADD 1 TO I.
GO TO 01-LOOP.
02-DONE.
STOP RUN.
END-PROGRAM.
Using 'PERFORM VARYING'
IDENTIFICATION DIVISION.
PROGRAM-ID. LOOP-1p5-NOADV-VARY.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 I PIC 99 VALUE 1.
88 END-LIST VALUE 10.
01 I-OUT PIC Z9.
PROCEDURE DIVISION.
PERFORM WITH TEST AFTER VARYING I FROM 1 BY 1 UNTIL END-LIST
MOVE I TO I-OUT
DISPLAY FUNCTION TRIM(I-OUT) WITH NO ADVANCING
IF NOT END-LIST
DISPLAY ", " WITH NO ADVANCING
END-IF
END-PERFORM.
STOP RUN.
END-PROGRAM.
CoffeeScript
# Loop plus half. This code shows how to break out of a loop early
# on the last iteration. For the contrived example, there are better
# ways to generate a comma-separated list, of course.
start = 1
end = 10
s = ''
for i in [start..end]
# the top half of the loop executes every time
s += i
break if i == end
# the bottom half of the loop is skipped for the last value
s += ', '
console.log s
ColdFusion
With tags:
<cfloop index = "i" from = "1" to = "10">
#i#
<cfif i EQ 10>
<cfbreak />
</cfif>
,
</cfloop>
With script:
for( i = 1; i <= 10; i++ ) //note: the ++ notation works only on version 8 up, otherwise use i=i+1
{
writeOutput( i );
if( i == 10 )
{
break;
}
writeOutput( ", " );
}
</cfscript>
Common Lisp
(loop for i from 1 below 10 do
(princ i) (princ ", ")
finally (princ i))
or
(loop for i from 1 upto 10 do
(princ i)
(if (= i 10) (return))
(princ ", "))
but for such simple tasks we can use format's powers:
(format t "~{~a~^, ~}" (loop for i from 1 to 10 collect i))
D
Iterative
import std.stdio;
void main() {
for (int i = 1; ; i++) {
write(i);
if (i >= 10)
break;
write(", ");
}
writeln();
}
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Functional Style
void main() {
import std.stdio, std.range, std.algorithm, std.conv, std.string;
iota(1, 11).map!text.join(", ").writeln;
// A simpler solution:
writefln("%(%d, %)", iota(1, 11));
}
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Dart
String loopPlusHalf(start, end) {
var result = '';
for(int i = start; i <= end; i++) {
result += '$i';
if(i == end) {
break;
}
result += ', ';
}
return result;
}
void main() {
print(loopPlusHalf(1, 10));
}
Delphi
program LoopsNPlusOneHalf;
{$APPTYPE CONSOLE}
var
i: integer;
const
MAXVAL = 10;
begin
for i := 1 to MAXVAL do
begin
Write(i);
if i < MAXVAL then
Write(', ');
end;
Writeln;
end.
DWScript
var i : Integer;
for i := 1 to 10 do begin
Print(i);
if i < 10 then
Print(', ');
end;
E
A typical loop+break solution:
var i := 1
while (true) {
print(i)
if (i >= 10) { break }
print(", ")
i += 1
}
Using the loop primitive in a semi-functional style:
var i := 1
__loop(fn {
print(i)
if (i >= 10) {
false
} else {
print(", ")
i += 1
true
}
})
EchoLisp
(string-delimiter "")
(for ((i (in-range 1 11))) (write i) #:break (= i 10) (write ","))
→ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10
;; or
(string-join (range 1 11) ",")
→ 1,2,3,4,5,6,7,8,9,10
EDSAC order code
[ N and a half times loop
### =================
A program for the EDSAC
Works with Initial Orders 2 ]
T56K
GK
O16@
[ 1 ] T24@
A25@
A18@
U25@
S23@
E11@
O25@
O19@
O20@
G1@
[ 11 ] O18@
O17@
O21@
O22@
ZF
[ 16 ] #F
[ 17 ] PF
[ 18 ] QF
[ 19 ] NF
[ 20 ] !F
[ 21 ] @F
[ 22 ] &F
[ 23 ] JF
[ 24 ] PF
[ 25 ] PF
EZPF
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Elixir
defmodule Loops do
def n_plus_one_half([]), do: IO.puts ""
def n_plus_one_half([x]), do: IO.puts x
def n_plus_one_half([h|t]) do
IO.write "#{h}, "
n_plus_one_half(t)
end
end
Enum.to_list(1..10) |> Loops.n_plus_one_half
Erlang
%% Implemented by Arjun Sunel
-module(loop).
-export([main/0]).
main() ->
for_loop(1).
for_loop(N) ->
if N < 10 ->
io:format("~p, ",[N] ),
for_loop(N+1);
true ->
io:format("~p\n",[N])
end.
ERRE
FOR I=1 TO 10 DO
PRINT(I;)
EXIT IF I=10
PRINT(", ";)
END FOR
Euphoria
for i = 1 to 10 do
printf(1, "%g", {i})
if i < 10 then
puts(1, ", ")
end if
end for
While, yes, use of exit would also work here, it is slightly faster to code it this way, if only the last iteration has something different.
=={{header|F Sharp|F#}}== Functional version that works for lists of any length
let rec print (lst : int list) =
match lst with
| hd :: [] ->
printf "%i " hd
| hd :: tl ->
printf "%i, " hd
print tl
| [] -> printf "\n"
print [1..10]
Factor
: print-comma-list ( n -- )
[ [1,b] ] keep '[
[ number>string write ]
[ _ = [ ", " write ] unless ] bi
] each nl ;
Falcon
for value = 1 to 10
formiddle
>> value
>> ", "
end
forlast: > value
end
{{out}}
prompt$ falcon forto.fal
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
FALSE
1[$9>~][$.", "1+]#.
Fantom
class Main
{
public static Void main ()
{
for (Int i := 1; i <= 10; i++)
{
Env.cur.out.writeObj (i)
if (i == 10) break
Env.cur.out.writeChars (", ")
}
Env.cur.out.printLine ("")
}
}
FBSL
#APPTYPE CONSOLE
For Dim i = 1 To 10
PRINT i;
IF i < 10 THEN PRINT ", ";
Next
PAUSE
Output
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Press any key to continue...
Forth
: comma-list ( n -- )
dup 1 ?do i 1 .r ." , " loop
. ;
: comma-list ( n -- )
dup 1+ 1 do
i 1 .r
dup i = if leave then \ or DROP UNLOOP EXIT to exit loop and the function
[char] , emit space
loop drop ;
: comma-list ( n -- )
1
begin dup 1 .r
2dup <>
while ." , " 1+
repeat 2drop ;
Fortran
{{works with|FORTRAN|IV and later}}
C Loops N plus one half - Fortran IV (1964)
INTEGER I
WRITE(6,301) (I,I=1,10)
301 FORMAT((I3,','))
END
{{works with|Fortran|77 and later}}
C WARNING: This program is not valid ANSI FORTRAN 77 code. It uses
C two nonstandard characters on the lines labelled 5001 and 5002.
C Many F77 compilers should be okay with it, but it is *not*
C standard.
PROGRAM LOOPPLUSONEHALF
INTEGER I, TEN
C I'm setting a parameter to distinguish from the label 10.
PARAMETER (TEN = 10)
DO 10 I = 1, TEN
C Write the number only.
WRITE (*,5001) I
C If we are on the last one, stop here. This will make this test
C every iteration, which can slow your program down a little. If
C you want to speed this up at the cost of your own convenience,
C you could loop only to nine, and handle ten on its own after
C the loop is finished. If you don't care, power to you.
IF (I .EQ. TEN) GOTO 10
C Append a comma to the number.
WRITE (*,5002) ','
10 CONTINUE
C Always finish with a newline. This programmer hates it when a
C program does not end its output with a newline.
WRITE (*,5000) ''
STOP
5000 FORMAT (A)
C Standard FORTRAN 77 is completely incapable of completing a
C WRITE statement without printing a newline. This program would
C be much more difficult (i.e. impossible) to write in the ANSI
C standard, without cheating and saying something like:
C
C WRITE (*,*) '1, 2, 3, 4, 5, 6, 7, 8, 9, 10'
C
C The dollar sign at the end of the format is a nonstandard
C character. It tells the compiler not to print a newline. If you
C are actually using FORTRAN 77, you should figure out what your
C particular compiler accepts. If you are actually using Fortran
C 90 or later, you should replace this line with the commented
C line that follows it.
5001 FORMAT (I3, $)
5002 FORMAT (A, $)
C5001 FORMAT (T3, ADVANCE='NO')
C5001 FORMAT (A, ADVANCE='NO')
END
{{Works with|Fortran|90 and later}}
i = 1
do
write(*, '(I0)', advance='no') i
if ( i == 10 ) exit
write(*, '(A)', advance='no') ', '
i = i + 1
end do
write(*,*)
FreeBASIC
' FB 1.05.0 Win64
For i As Integer = 1 To 10
Print Str(i);
If i < 10 Then Print ", ";
Next
Print
Sleep
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
FutureBasic
include "ConsoleWindow"
dim as long i, num : num = 10
for i = 1 to num
print i;
if i = num then exit for
print ",";
next i
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Gambas
'''[https://gambas-playground.proko.eu/?gist=c43cc581e5f93e70c5dc82733f609a7e Click this link to run this code]'''
Public Sub Main()
Dim siLoop As Short
For siLoop = 1 To 10
Print siLoop;
If siLoop <> 10 Then Print ", ";
Next
End
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
GAP
n := 10;
for i in [1 .. n] do
Print(i);
if i < n then
Print(", ");
else
Print("\n");
fi;
od;
GML
str = ""
for(i = 1; i <= 10; i += 1)
{
str += string(i)
if(i != 10)
str += ", "
}
show_message(str)
Go
package main
import "fmt"
func main() {
for i := 1; ; i++ {
fmt.Print(i)
if i == 10 {
fmt.Println()
break
}
fmt.Print(", ")
}
}
Gosu
var out = System.out
for(i in 1..10) {
if(i > 1) out.print(", ")
out.print(i)
}
Groovy
Solution:
for(i in (1..10)) {
print i
if (i == 10) break
print ', '
}
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Haskell
main :: IO ()
main = forM_ [1 .. 10] $ \n -> do
putStr $ show n
putStr $ if n == 10 then "\n" else ", "
You can also use intersperse :: a -> [a] -> [a]
intercalate ", " (map show [1..10])
hexiscript
for let i 1; i <= 10; i++
print i
if i = 10; break; endif
print ", "
endfor
println ""
HicEst
DO i = 1, 10
WRITE(APPend) i
IF(i < 10) WRITE(APPend) ", "
ENDDO
HolyC
U8 i, max = 10;
for (i = 1; i <= max; i++) {
Print("%d", i);
if (i == max) break;
Print(", ");
}
Print("\n");
IDL
Nobody would ever use a loop in IDL to output a vector of numbers - the requisite output would be generated something like this:
print,indgen(10)+1,format='(10(i,:,","))'
However if a loop had to be used it could be done like this:
for i=1,10 do begin
print,i,format='($,i)'
if i lt 10 then print,",",format='($,a)'
endfor
(which merely suppresses the printing of the comma in the last iteration);
or like this:
for i=1,10 do begin
print,i,format='($,i)'
if i eq 10 then break
print,",",format='($,a)'
end
(which terminates the loop early if the last element is reached).
=={{header|Icon}} and {{header|Unicon}}==
procedure main()
every writes(i := 1 to 10) do
if i = 10 then break write()
else writes(", ")
end
The above can be written more succinctly as:
every writes(c := "",1 to 10) do c := ","
J
output=: verb define
buffer=: buffer,y
)
loopy=: verb define
buffer=: ''
for_n. 1+i.10 do.
output ":n
if. n<10 do.
output ', '
end.
end.
smoutput buffer
)
Example use:
loopy 0
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
That said, note that neither loops nor output statements are necessary:
;}.,(', ' ; ":)&> 1+i.10
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
And, note also that this sort of data driven approach can also deal with more complex issues:
commaAnd=: ":&.> ;@,. -@# {. (<;._1 '/ and /') ,~ (<', ') #~ #
commaAnd i.5
0, 1, 2, 3 and 4
Java
public static void main(String[] args) {
for (int i = 1; ; i++) {
System.out.print(i);
if (i == 10)
break;
System.out.print(", ");
}
System.out.println();
}
JavaScript
function loop_plus_half(start, end) {
var str = '',
i;
for (i = start; i <= end; i += 1) {
str += i;
if (i === end) {
break;
}
str += ', ';
}
return str;
}
alert(loop_plus_half(1, 10));
Alternatively, if we stand back for a moment from imperative assumptions about the nature and structure of computing tasks, it becomes clear that the problem of special transitional cases as a pattern terminates has no necessary connection with loops. (See the comments accompanying the ACL2, Haskell, IDL, J and R examples above and below, and see also some of the approaches taken in languages like Clojure and Scala.
If a JavaScript expression evaluates to an array [1 .. 10] of integers, for example, we can map that array directly to a comma-delimited string by using the '''Array.join()''' function, writing something like:
function range(m, n) {
return Array.apply(null, Array(n - m + 1)).map(
function (x, i) {
return m + i;
}
);
}
console.log(
range(1, 10).join(', ')
);
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Otherwise, any special transitional case at the end of a pattern can be handled by defining conditional values for one or more sub-expressions:
function range(m, n) {
return Array.apply(null, Array(n - m + 1)).map(function (x, i) {
return m + i;
});
}
console.log(
(function (nFrom, nTo) {
var iLast = nTo - 1;
return range(nFrom, nTo).reduce(
function (accumulator, n, i) {
return accumulator +
n.toString() +
(i < iLast ? ', ' : ''); // conditional sub-expression
}, ''
)
})(1, 10)
);
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
= Otherwise =
var s=1, e=10
for (var i=s; i<=e; i+=1) {
document.write( i==s ? '' : ', ', i )
}
or
var s=1, e=10
for (;; s+=1) {
document.write( s )
if (s==e) break
document.write( ', ' )
}
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
jq
In jq, it is idiomatic to view a range of integers with boundaries m and n as [m, n), i.e. including m but excluding n.
One approach is to construct the answer incrementally:
def loop_plus_half(m;n):
if m<n then reduce range(m+1;n) as $i (m|tostring; . + ", " + ($i|tostring))
else empty
end;
# An alternative that is shorter and perhaps closer to the task description because it uses range(m;n) is as follows:
def loop_plus_half2(m;n):
[range(m;n) | if . == m then . else ", ", . end | tostring] | join("");
{{Out}} loop_plus_half2(1;11)
"1, 2, 3, 4, 5, 6, 7, 8, 9, 10"
Julia
The short-circuiting && is idiomatic to Julia - the second expression will only be evaluated if the first one is true.
for i = 1:10
print(i)
i == 10 && break
print(", ")
end
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Lasso
local(out) = ''
loop(10) => {
#out->append(loop_count)
loop_count == 10 ? loop_abort
#out->append(', ')
}
#out
K
p:{`0:$x} / output
i:1;do[10;p[i];p[:[i<10;", "]];i+:1];p@"\n"
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Alternative solutions:
10 {p@x;p@:[x<10;", ";"\n"];x+1}\1;
{p@x;p@:[x<10;", ";"\n"];x+1}'1+!10; /variant
Kotlin
// version 1.0.6
fun main(args: Array<String>) {
for (i in 1 .. 10) {
print(i)
if (i < 10) print(", ")
}
}
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
LabVIEW
{{VI snippet}}
[[File:LabVIEW_Loops_N_plus_one_half.png]]
Lang5
: , dup ", " 2 compress "" join ;
1 do dup 10 != if dup , . 1 + else . break then loop
Word: [[Loops/For#Lang5]]
: 2string 2 compress "" join ;
: , dup 10 != if ", " 2string then ;
1 10 "dup , . 1+" times
Lhogho
type doesn't output a newline. The print outputs one.
for "i [1 10]
[
type :i
if :i < 10
[
type "|, |
]
]
print
A more list-y way of doing it
to join :lst :sep
if list? :lst
[
ifelse count :lst > 1
[
op (word first :lst :sep joinWith butfirst :lst :sep)
]
[
op (word last :lst)
]
]
op :lst
end
make "aList [1 2 3 4 5 6 7 8 9 10]
print join :aList "|, |
Liberty BASIC
Keyword 'exit' allows the termination.
for i =1 to 10
print i;
if i =10 then exit for
print ", ";
next i
end
Lisaac
Section Header
+ name := LOOP_AND_HALF;
Section Public
- main <- (
+ i : INTEGER;
i := 1;
{
i.print;
i = 10
}.until_do {
", ".print;
i := i + 1;
};
'\n'.print;
);
LiveCode
repeat with n = 1 to 10
put n after loopn
if n is not 10 then put comma after loopn
end repeat
put loopn
Logo
to comma.list :n
repeat :n-1 [type repcount type "|, |]
print :n
end
comma.list 10
Lua
Translation of C:
for i = 1, 10 do
io.write(i)
if i == 10 then break end
io.write", "
end
M2000 Interpreter
Module Checkit {
\\ old type loop
For i=1 to 10
Print i;
If i=10 Then Exit For
Print ", ";
Next i
Print
\\ fast type loop. Continue exit block, without breaking loop.
For i=1 to 10 {
Print i;
If i=10 Then Continue
Print ", ";
}
Print
Print
i=0
{
loop \\ this mark block for loop, each time need to mark
i++
Print i;
If i=10 Then Exit ' so now we use exit to break loop
Print ", ";
}
Print
}
Checkit
M4
define(`break',
`define(`ulim',llim)')
define(`for',
`ifelse($#,0,``$0'',
`define(`ulim',$3)`'define(`llim',$2)`'ifelse(ifelse($3,`',1,
`eval($2<=$3)'),1,
`pushdef(`$1',$2)$4`'popdef(`$1')$0(`$1',incr($2),ulim,`$4')')')')
for(`x',`1',`',
`x`'ifelse(x,10,`break',`, ')')
Maple
for i to 10 do printf( "%d%s", i, `if`( i = 10, "\n", ", " ) ) end:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Mathematica
i = 1; s = "";
While[True,
s = s <> ToString@i;
If[i == 10, Break[]];
s = s <> ",";
i++;
]
s
=={{header|MATLAB}} / {{header|Octave}}== Vectorized form:
printf('%i, ',1:9); printf('%i\n',10);
Explicite loop:
for k=1:10,
printf('%i', k);
if k==10, break; end;
printf(', ');
end;
printf('\n');
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
MAXScript
for i in 1 to 10 do
(
format "%" i
if i == 10 then exit
format "%" ", "
)
Make
NEXT=`expr $* + 1`
MAX=10
RES=1
all: 1-n;
$(MAX)-n:
@echo $(RES)
%-n:
@-make -f loop.mk $(NEXT)-n MAX=$(MAX) RES=$(RES),$(NEXT)
Invoking it |make -f loop.mk MAX=10 1,2,3,4,5,6,7,8,9,10
Metafont
Since message append always a newline, we need building the output inside a string, and then we output it.
last := 10;
string s; s := "";
for i = 1 upto last:
s := s & decimal i;
if i <> last: s := s & ", " fi;
endfor
message s;
end
=={{header|Modula-3}}==
MODULE Loop EXPORTS Main;
IMPORT IO, Fmt;
VAR i := 1;
BEGIN
LOOP
IO.Put(Fmt.Int(i));
IF i = 10 THEN EXIT; END;
IO.Put(", ");
i := i + 1;
END;
IO.Put("\n");
END Loop.
Nemerle
foreach (i in [1 .. 10])
{
Write(i);
unless (i == 10) Write(", ");
}
MUMPS
LOOPHALF
NEW I
FOR I=1:1:10 DO
.WRITE I
.IF I'=10 WRITE ", "
QUIT
;Alternate
NEW I FOR I=1:1:10 WRITE I WRITE:I'=10 ", "
KILL I QUIT
Output:
USER>D LOOPHALF^ROSETTA
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
USER>D LOOPHALF+7^ROSETTA
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
NetRexx
/* NetRexx */
/* NetRexx */
options replace format comments java crossref savelog symbols nobinary
say
say 'Loops/N plus one half'
rs = ''
istart = 1
iend = 10
loop i_ = istart to iend
rs = rs || ' ' || i_
if i_ < iend then do
rs = rs','
end
end i_
say rs.strip()
'''Output'''
Loops/N plus one half
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
NewLISP
(for (i 0 10)
(print i)
(unless (= i 10)
(print ", ")))
=={{header|NS-HUBASIC}}==
## Microsoft Small Basic
```smallbasic
For i = 1 To 10
TextWindow.Write(i)
If i <> 10 Then
TextWindow.Write(", ")
EndIf
EndFor
TextWindow.WriteLine("")
Nim
var s = ""
for i in 1..10:
if s.len > 0: s.add(", ")
s.add($i)
echo s
Objeck
bundle Default {
class Hello {
function : Main(args : String[]) ~ Nil {
for(i := 1; true; i += 1;) {
i->Print();
if(i = 10) {
break;
};
", "->Print();
};
'\n'->Print();
}
}
}
OCaml
let last = 10 in
for i = 1 to last do
print_int i;
if i <> last then
print_string ", ";
done;
print_newline();
let ints = [1; 2; 3; 4; 5; 6; 7; 8; 9; 10] in
let str_ints = List.map string_of_int ints in
print_endline (String.concat ", " str_ints);
Oforth
: loopn
| i |
10 loop: i [ i dup print 10 ifEq: [ break ] "," . ] printcr ;
Oz
Using a for-loop:
for N in {List.number 1 10 1} break:Break do
{System.printInfo N}
if N == 10 then {Break} end
{System.printInfo ", "}
end
However, it seems more natural to use a left fold:
declare
fun {CommaSep Xs}
case Xs of nil then nil
[] X|Xr then
{FoldL Xr
fun {$ Z X} Z#", "#X end
X}
end
end
in
{System.showInfo {CommaSep {List.number 1 10 1}}}
PARI/GP
n=0;
while(1,
print1(n++);
if(n>9, break);
print1(", ")
);
Panda
Panda is stream based. To know if there is no more values you need to know it's the last. You can only do that if you get all the values. So this is functional style; We accumulate all the values from the stream. Then join them together as strings with a comma.
array{{1..10}}.join(',')
Pascal
program numlist(output);
const MAXNUM: integer = 10;
var
i: integer;
begin
{ loop 1: w/ if branching }
for i := 1 to MAXNUM do
begin
write(i);
if i <> MAXNUM then
write(', ')
end;
writeln;
{ loop 2: w/o if branching }
for i := 1 to MAXNUM-1 do
write(i, ', ');
writeln(MAXNUM);
end.
Peloton
10|<@ SAYPOSFOR>...</@><@ ABF>,</@></@>
Perl
for my $i(1..10) {
print $i;
last if $i == 10;
print ', ';
}
print "\n";
In perl one would solve the task via join.
print join(', ', 1..10), "\n";
Perl 6
for 1 .. 10 {
.print;
last when 10;
print ', ';
}
print "\n";
Phix
for i=1 to 10 do
printf(1,"%d",i)
if i=10 then exit end if
printf(1,", ")
end for
PHP
for ($i = 1; $i <= 11; $i++) {
echo $i;
if ($i == 10)
break;
echo ', ';
}
echo "\n";
PicoLisp
(for N 10
(prin N)
(T (= N 10))
(prin ", ") )
Pike
int main(){
for(int i = 1; i <= 11; i++){
write(sprintf("%d",i));
if(i == 10){
break;
}
write(", ");
}
write("\n");
}
PL/I
do i = 1 to 10;
put edit (trim(i)) (a);
if i < 10 then put edit (', ') (a);
end;
Pop11
lvars i;
for i from 1 to 10 do
printf(i, '%p');
quitif(i = 10);
printf(', ', '%p');
endfor;
printf('\n', '%p');
PowerShell
{{trans|C}}
for ($i = 1; $i -le 10; $i++) {
Write-Host -NoNewLine $i
if ($i -eq 10) {
Write-Host
break
}
Write-Host -NoNewLine ", "
}
An interesting alternative solution, although not ''strictly'' a loop, even though switch certainly loops over the given range.
switch (1..10) {
{ $true } { Write-Host -NoNewLine $_ }
{ $_ -lt 10 } { Write-Host -NoNewLine ", " }
{ $_ -eq 10 } { Write-Host }
}
PureBasic
x=1
Repeat
Print(Str(x))
x+1
If x>10: Break: EndIf
Print(", ")
ForEver
Prolog
example :-
between(1,10,Val), write(Val), Val<10, write(', '), fail.
example.
?- example.
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
true.
Python
The particular pattern and example chosen in the task description is recognised by the Python language and there are more idiomatic ways to achieve the result that don't even require an explicit conditional test such as:
print ( ', '.join(str(i+1) for i in range(10)) )
But the [http://academicearth.org/lectures/the-loop-and-half-problem named pattern] is shown by code such as the following:
from sys import stdout
>>> write = stdout.write
>>> n, i = 10, 1
>>> while True:
write(i)
i += 1
if i > n:
break
write(', ')
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
>>>
R
The natural way to solve this task in R is:
paste(1:10, collapse=", ")
The task specifies that we should use a loop however, so this more verbose code is needed.
for(i in 1:10)
{
cat(i)
if(i==10)
{
cat("\n")
break
}
cat(", ")
}
Racket
#lang racket
(for ((i (in-range 1 15)))
(display i)
#:break (= 10 i)
(display ", "))
Gives the desired output.
REBOL
REBOL [
Title: "Loop Plus Half"
URL: http://rosettacode.org/wiki/Loop/n_plus_one_half
]
repeat i 10 [
prin i
if 10 = i [break]
prin ", "
]
print ""
REXX
two CHAROUTs
/*REXX program displays: 1,2,3,4,5,6,7,8,9,10 */
do j=1 to 10
call charout ,j /*write the DO loop index (no LF). */
if j<10 then call charout ,"," /*append a comma for one-digit numbers.*/
end /*j*/
/*stick a fork in it, we're all done. */
'''output'''
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
one CHAROUT
/*REXX program displays: 1,2,3,4,5,6,7,8,9,10 */
do j=1 for 10 /*using FOR is faster than TO. */
call charout ,j || left(',',j<10) /*display J, maybe append a comma (,).*/
end /*j*/
/*stick a fork in it, we're all done. */
'''output'''
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
version 3 if the number of items is not known
list='aa bb cc dd'
sep=', '
Do i=1 By 1 While list<>''
If i>1 Then Call charout ,sep
Parse Var list item list
Call charout ,item
End
{{out}}
aa, bb, cc, dd
Ring
for x = 1 to 10 see x if x=10 exit ok see ", " next see nl
Ruby
(1..10).each do |i|
print i
break if i == 10
print ", "
end
puts
More idiomatic Ruby to obtain the same result is:
puts (1..10).join(", ")
Rust
fn main() {
for i in 1..=10 {
print!("{}{}", i, if i < 10 { ", " } else { "\n" });
}
}
More like the problem description:
fn main() {
for i in 1..=10 {
print!("{}", i);
if i == 10 {
break;
}
print!(", ");
}
println!();
}
Alternative solution using join.
fn main() {
println!(
"{}",
(1..=10)
.map(|i| i.to_string())
.collect::<Vec<_>>()
.join(", ")
);
}
Run BASIC
FOR i = 1 TO 10
PRINT cma$;i;
cma$ = " , "
NEXT i
=={{header|S-lang}}==
This may constitute not following directions, but I've always felt
the most readable and general way to code this is to move the "optional"
part from the bottom to the top of the loop, then NOT include it on the
FIRST pass:
## Salmon
```Salmon
iterate (x; [1...10])
{
print(x);
if (x == 10)
break;;
print(", ");
};
print("\n");
Scala
{{libheader|Scala}}
object LoopAndHalf extends App {
println((1 to 10).mkString(", "))
}
Scheme
It is possible to use continuations:
(call-with-current-continuation
(lambda (esc)
(do ((i 1 (+ 1 i))) (#f)
(display i)
(if (= i 10) (esc (newline)))
(display ", "))))
But usually making the tail recursion explicit is enough:
(let loop ((i 0))
(display i)
(if (= i 10)
(newline)
(begin
(display ", ")
(loop (+ 1 i)))))
Scilab
{{works with|Scilab|5.5.1}}
{{out}}
```txt
1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10
Seed7
$ include "seed7_05.s7i";
const proc: main is func
local
var integer: number is 0;
begin
for number range 1 to 10 do
write(number);
if number < 10 then
write(", ")
end if;
end for;
writeln;
end func;
Sidef
for (1..10) { |i|
print i;
i == 10 && break;
print ', ';
}
print "\n";
Smalltalk
1 to: 10 do: [:n |
Transcript show: n asString.
n < 10 ifTrue: [ Transcript show: ', ' ]
]
SNOBOL4
It's idiomatic in Snobol to accumulate the result in a string buffer for line output, and to use the same statement for loop control and the comma.
loop str = str lt(i,10) (i = i + 1) :f(out)
str = str ne(i,10) ',' :s(loop)
out output = str
end
{{works with|Macro Spitbol}}
For the task description, it's possible (implementation dependent) to set an output variable to raw mode for character output within the loop.
This example also breaks the loop explicitly:
output('out',1,'-[-r1]')
loop i = lt(i,10) i + 1 :f(end)
out = i
eq(i,10) :s(end)
out = ',' :(loop)
end
{{out}}
1,2,3,4,5,6,7,8,9,10
SNUSP
+++++++++<!/+. >-?\# digit and loop test
| | \@@@+@+++++# \>>.<.<</ comma and space
| \@@+@@+++++#
\@@@@=++++#
Spin
{{works with|BST/BSTC}} {{works with|FastSpin/FlexSpin}} {{works with|HomeSpun}} {{works with|OpenSpin}}
con
_clkmode = xtal1 + pll16x
_clkfreq = 80_000_000
obj
ser : "FullDuplexSerial.spin"
pub main | n
ser.start(31, 30, 0, 115200)
repeat n from 1 to 10
ser.dec(n)
if n<10
ser.str(string(", "))
ser.str(string(13, 10))
waitcnt(_clkfreq + cnt)
ser.stop
cogstop(0)
{{out}}
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Stata
forv i=1/10 {
di `i' _continue
if `i'<10 {
di ", " _continue
}
else {
di
}
}
Mata
mata
for (i=1; i<=10; i++) {
printf("%f",i)
if (i<10) {
printf(", ")
} else {
printf("\n")
}
}
end
Swift
{{works with|Swift|1.x}}
for var i = 1; ; i++ {
print(i)
if i == 10 {
println()
break
}
print(", ")
}
{{works with|Swift|2}} The usual way to do this with Swift 2 is:
for i in 1...10 {
print(i, terminator: i == 10 ? "\n" : ", ")
}
To satisfy the specification, we have to do something similar to Swift 1.x and other C-like languages:
for var i = 1; ; i++ {
print(i, terminator: "")
if i == 10 {
print("")
break
}
print(", ", terminator: "")
}
Tcl
for {set i 1; set end 10} true {incr i} {
puts -nonewline $i
if {$i >= $end} break
puts -nonewline ", "
}
puts ""
However, that's not how the specific task (printing 1..10 with comma separators) would normally be done. (Note, the solution below is ''not'' a solution to the half-looping problem.)
proc range {from to} {
set result {}
for {set i $from} {$i <= $to} {incr i} {
lappend result $i
}
return $i
}
puts [join [range 1 10] ", "] ;# ==> 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
=={{header|TI-89 BASIC}}==
There is no horizontal cursor position on the program IO screen, so we concatenate strings instead.
Local str
"" → str
For i,1,10
str & string(i) → str
If i < 10 Then
str & "," → str
EndIf
EndFor
Disp str
TUSCRIPT
$$ MODE TUSCRIPT
line=""
LOOP n=1,10
line=CONCAT (line,n)
IF (n!=10) line=CONCAT (line,", ")
ENDLOOP
PRINT line
Output:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
UnixPipes
The last iteration is handled automatically for us when there is no element in one of the pipes.
yes \ | cat -n | head -n 10 | paste -d\ - <(yes , | head -n 9) | xargs echo
UNIX Shell
for(( Z=1; Z<=10; Z++ )); do
echo -e "$Z\c"
if (( Z != 10 )); then
echo -e ", \c"
fi
done
{{works with|Bash}}
for ((i=1;i<=$((last=10));i++)); do
echo -n $i
[ $i -eq $last ] && break
echo -n ", "
done
Ursa
{{trans|PHP}}
decl int i
for (set i 1) (< i 11) (inc i)
out i console
if (= i 10)
break
end if
out ", " console
end for
out endl console
V
[loop
[ [10 =] [puts]
[true] [dup put ',' put succ loop]
] when].
Using it |1 loop =1,2,3,4,5,6,7,8,9,10
VBA
Public Sub WriteACommaSeparatedList()
Dim i As Integer
Dim a(1 To 10) As String
For i = 1 To 10
a(i) = CStr(i)
Next i
Debug.Print Join(a, ", ")
End Sub
Vedit macro language
This example writes the output into current edit buffer.
for (#1 = 1; 1; #1++) {
Num_Ins(#1, LEFT+NOCR)
if (#1 == 10) { Break }
Ins_Text(", ")
}
Ins_Newline
Vim Script
for i in range(1, 10)
echon i
if (i != 10)
echon ", "
endif
endfor
Visual Basic .NET
For i = 1 To 10
Console.Write(i)
If i = 10 Then Exit For
Console.Write(", ")
Next
Wart
for i 1 (i <= 10) ++i
pr i
if (i < 10)
pr ", "
(prn)
Wee Basic
print 1 "" ensures the end of program text is separate from the list of numbers.
print 1 ""
for numbers=1 to 10
print 1 at numbers*3-2,0 numbers
if numbers<>10
print 1 at numbers*3-1,0 ","
endif
end
XPL0
codes CrLf=9, IntOut=11, Text=12;
int N;
[for N:= 1 to 10 do \best way to do this
[IntOut(0, N); if N#10 then Text(0, ", ")];
CrLf(0);
N:= 1; \way suggested by task statement
loop [IntOut(0, N);
if N=10 then quit;
Text(0, ", ");
N:= N+1;
];
CrLf(0);
]
zkl
foreach n in ([1..10]){ print(n); if (n!=10) print(",") }
Or, using a state machine:
[1..10].pump(Console.print, Void.Drop, T(Void.Write,",",Void.Drop));
where pump is (sink, action, action ...). The first Drop writes the first object from the source (1) to the sink and drops out (and that iteration of the loop is done). For the rest of the loop, Write collects things to write to the sink: a comma and the number, eg ",2". Or:
[1..10].pump(Console.print, Void.Drop, fcn(n){ String(",",n) });