Loops/Infinite

Specifically print out "SPAM" followed by a newline in an infinite loop.

360 Assembly

This for sure will result in a severe WTO buffer shortage. <lang 360 Assembly> INFINITE CSECT , this PGM control section INFINITE AMODE 31 addressing mode 31 bit INFINITE RMODE ANY loader can load either 24 or 31

        BAKR  14,0                    stack caller's register contents
        LR    12,15                   establish base 
        LA    13,0                    no savearea 
        USING INFINITE,12             base to assembler 
        LA    10,1                    1 in reg 10 
        LA    11,2                    2 in reg 11

LOOP EQU *

        CR    10,11                   1==2? 
        BE    RETURN                  Yes, exit. 
       WTO    'SPAM',ROUTCDE=11       print SPAM to syslog 
        B     LOOP                    No, check again.

RETURN PR , return to caller

        END   INFINITE

</lang>

4DOS Batch

<lang 4dos>@echo off do forever

 echo SPAM

enddo</lang>

6502 Assembly

Specific OS/hardware routines for printing are left unimplemented. <lang 6502asm>InfiniteLoop LDX #0 PrintLoop: LDA MSG,x JSR PrintAccumulator ;routine not implemented INX CPX #5 BNE PrintLoop BEQ InfiniteLoop

MSG .byte "SPAM", $0A</lang>

6800 Assembly

<lang> .cr 6800

       .tf  spam6800.obj,AP1
       .lf  spam6800

=====================================================;
Infinite SPAM loop for the Motorola 6800 ;
by barrym 2013-04-10 ;
-----------------------------------------------------;
Prints the message "SPAM" repeatedly to an ascii ;
terminal (console) connected to a 1970s vintage ;
SWTPC 6800 system, which is the target device for ;
this assembly. ;
Many thanks to: ;
swtpc.com for hosting Michael Holley's documents! ;
sbprojects.com for a very nice assembler! ;
swtpcemu.com for a very capable emulator! ;
reg x is the string pointer ;
reg a holds the ascii char to be output ;
-----------------------------------------------------;

outeee = $e1d1 ;ROM: console putchar routine

       .or  $0f00

-----------------------------------------------------;

main ldx #string ;Point to the string

       bra  puts       ;  and print it

outs jsr outeee ;Emit a as ascii

       inx             ;Advance the string pointer

puts ldaa ,x ;Load a string character

       bne  outs       ;Print it if non-null
       bra  main       ;else restart

=====================================================;

string .as "SPAM",#13,#10,#0

       .en</lang>

8th

One way: <lang forth>

inf "SPAM\n" . recurse ;

</lang> Another way: <lang forth>

inf repeat "SPAM\n" . again ;

</lang>

ACL2

<lang Lisp>(defun spam ()

  (declare (xargs :mode :program))
  (if nil
      nil
      (prog2$ (cw "SPAM~%")
              (spam))))</lang>

ActionScript

<lang actionscript>while (true) {

   trace("SPAM");

}</lang>

Ada

<lang ada>loop

  Put_Line("SPAM");

end loop;</lang>

Aime

<lang aime>while (1) {

   o_text("SPAM\n");

}</lang>

ALGOL 68

<lang algol68>DO

 printf($"SPAM"l$)

OD</lang> Or the classic "dynamic halt": <lang algol68>loop x:

  printf($"SPAM"l$);

loop x</lang>

ALGOL W

<lang algolw>begin

   for i := 1 step 0 until 2 do write( "SPAM" )

end.</lang>

AmigaE

<lang amigae>PROC main()

 LOOP
   WriteF('SPAM')
 ENDLOOP

ENDPROC</lang>

AppleScript

<lang applescript>repeat

 log "SPAM"

end repeat</lang>

ARM Assembly

<lang ARM_Assembly> .global main

main:

loop:

   ldr r0, =message
   bl printf
   b loop

message:

   .asciz "SPAM\n"

</lang>

AutoHotkey

<lang autohotkey>Loop

 MsgBox SPAM `n</lang>

AWK

<lang awk>BEGIN {

 while(1) {
   print "SPAM"
 }

}</lang>

Axe

Warning: running this program will cause you to need to reset your calculator, thereby losing any user data stored in RAM.

<lang axe>While(1)

Disp "SPAM",i

End</lang>

BASIC

Works with: QuickBasic version 4.5

Old-fashioned syntax: <lang qbasic>while 1

 print "SPAM"

wend</lang>

Standard BASIC: <lang qbasic>do

 print "SPAM"

loop</lang>

Also <lang qbasic>for i = 1 to 10 step 0

 print "SPAM"

next i</lang>

Works with: Applesoft BASIC

Works with: ZX Spectrum Basic

10 PRINT "SPAM"
20 GOTO 10

Rather than a GOTO, instead we can use a FOR statement:

10 FOR l = 1 TO 10 STEP 0: REM A zero step makes the loop infinite
20 PRINT "SPAM"
30 NEXT l

Applesoft BASIC

<lang ApplesoftBasic>FOR I = 0 TO 1 STEP 0 : PRINT "SPAM" : NEXT</lang>

Batch File

Using goto: <lang dos>@echo off

loop

echo SPAM goto loop</lang> Another variant which uses Windows NT's for statement:

Works with: Windows NT version 4 or later

<lang dos>for /l %%x in (1,0,2) do @echo SPAM</lang> This essentially is a counted loop which starts at 1, increments by 0 and stops when the counter reaches 2.

BBC BASIC

<lang bbcbasic> REPEAT

       PRINT "SPAM"
     UNTIL FALSE</lang>

bc

<lang bc>while (1) "SPAM "</lang>

Befunge

Because the 2-D code space is toroidal, all loops are infinite unless explicitly stopped with @. <lang befunge>55+"MAPS",,,,,</lang>

Brainf***

Bracmat

Brat

C

<lang c>while(1) puts("SPAM");</lang> or <lang c> for(;;) puts("SPAM");</lang> or <lang c>do { puts("SPAM"); } while(1);</lang> or <lang c>while(puts("SPAM"));</lang>

ChucK

<lang> while(true) <<<"SPAM">>>; </lang>

C++

Translation of: C

<lang cpp>while (true)

 std::cout << "SPAM" << std::endl;</lang>

or <lang cpp>for (;;)

 std::cout << "SPAM" << std::endl;</lang>

or <lang cpp>do

 std::cout << "SPAM" << std::endl;

while (true);</lang>

C#

<lang csharp>while (true) {

   Console.WriteLine("SPAM");

}</lang>

Chapel

<lang chapel>while true do writeln("SPAM");</lang>

ColdFusion

This will result in a JRun Servlet Error and heap dump.

With tags: <lang cfm><cfloop condition = "true NEQ false">

 SPAM

</cfloop></lang> With script: <lang cfm><cfscript>

 while( true != false )
 {
   writeOutput( "SPAM" );
 }

</cfscript></lang>

Clojure

<lang lisp>(loop [] (println "SPAM") (recur))</lang>

COBOL

<lang cobol> IDENTIFICATION DIVISION.

      PROGRAM-ID. Spam.

      PROCEDURE DIVISION.
          PERFORM UNTIL 1 <> 1
              DISPLAY "SPAM"
          END-PERFORM

          GOBACK
          .</lang>

OpenCOBOL supports a FOREVER clause for PERFORM which will have the same effect.

CoffeeScript

<lang coffeescript>loop

 console.log 'SPAM'

</lang>

Common Lisp

<lang lisp>(loop (write-line "SPAM"))</lang>

D

Some common ways to create an infinite printing loop: <lang d>import std.stdio;

void main() {

   while (true)
       writeln("SPAM");

}</lang>

<lang d>import std.stdio;

void main() {

   do
       writeln("SPAM");
   while (true);

}</lang>

<lang d>import std.stdio;

void main() {

   for ( ; ; )
       writeln("SPAM");

}</lang>

<lang d>import std.stdio;

void main() {

   LOOP:
   writeln("SPAM");
   goto LOOP;

}</lang>

dc

This loop is a tail-recursive function. The program pushes the function on the stack, the outer dx makes the first call, and the inner dx makes each recursive call.

DCL

<lang DCL>$ loop: $ write sys$output "SPAM" $ goto loop</lang>

Déjà Vu

<lang dejavu>while true: !print "SPAM"</lang> Infinite recursion thanks to tail calls: <lang dejavu>labda: !print "SPAM" recurse call</lang>

Delphi

<lang Delphi>while True do Writeln('SPAM');</lang>

DWScript

<lang Delphi>while True do

  PrintLn('SPAM');</lang>

E

<lang e>while (true) {

   println("SPAM")

}</lang>

<lang e>def f() {

   println("SPAM")
   f <- ()

} f <- ()</lang>

The difference between these is that in the second, other activities can be interleaved with the loop; in the first, no other processing will occur in this vat.

Ela

Direct Approach

<lang ela>open monad io

loop () = do

 putStrLn "SPAM"
 loop ()

loop () ::: IO</lang>

Non-strict version

<lang ela>open monad io

xs = "SPAM"::xs

takeit 0 _ = do return () takeit num (x::xs) = do

 putStrLn x
 takeit (num - 1) xs

_ = takeit 10 xs ::: IO</lang>

Erlang

<lang erlang> -module (main). -export ([main/0]).

main() ->

 io:fwrite( "SPAM~n" ),
 main().

</lang>

ERRE

<lang ERRE> LOOP

 PRINT("SPAM")

END LOOP </lang> You can use also WHILE TRUE..END WHILE or REPEAT...UNTIL FALSE loops.

Euphoria

<lang Euphoria> while 1 do

   puts(1, "SPAM\n")

end while </lang>

F#

<lang fsharp> // Imperative Solution while true do

   printfn "SPAM"

// Functional solution let rec forever () : unit =

   printfn "SPAM"
   forever ()

</lang>

Factor

<lang factor>: spam ( -- ) "SPAM" print spam ;</lang> <lang factor>: spam ( -- ) [ "SPAM" print t ] loop ;</lang>

FALSE

Fantom

<lang fantom> class Main {

 public static Void main ()
 {
   while (true) 
   {
     echo ("SPAM")
   }
 }

} </lang>

Forth

<lang forth>: email begin ." SPAM" cr again ;</lang>

Fortran

FORTRAN 77 <lang fortran>

  10 WRITE(*,*) 'SPAM'
     GO TO 10
     END

</lang>

Fortran 90 <lang fortran> program spam

 implicit none
 do
   write(*,*) 'SPAM'
 end do

end program spam </lang>

Frink

<lang frink> while true

  println["SPAM"]

</lang>

GAP

<lang gap>while true do

   Print("SPAM\n");

od;</lang>

GML

<lang GML>while(1)

   show_message("SPAM")</lang>

Go

<lang go>package main import "fmt" func main() { for { fmt.Printf("SPAM\n") } }</lang>

Groovy

<lang groovy>while (true) {

println 'SPAM'

}</lang>

Haskell

<lang haskell>forever (putStrLn "SPAM")</lang> or <lang haskell>import Control.Monad.Fix (fix) fix (putStrLn "SPAM" >>) </lang>

HicEst

<lang hicest>DO i = 1, 1E20 ! for i with 16 or more digits: i == i + 1 == loop infinite

   WRITE() "SPAM"

ENDDO</lang>

Icon and Unicon

There are several ways to write infinite loops in Icon. The most straightforward would be with repeat. <lang icon>procedure main()

  repeat write("SPAM")

end</lang>

Alternately one could use one of these: <lang icon>until &fail do write("SPAM") # always fails, needs succeed to break ... while write("SPAM") # always succeeds, needs failure to break ... every write(|"SPAM") # generator always succeeds, needs failure to break ... while write(|"SPAM") # this is a common mistake that results in an endless loop ... while write(1 to 5) # a clearer version of the same mistake that generates endless 1's</lang>

IDL

<lang IDL>while 1 do print,'SPAM'</lang>

Intercal

Assuming Turing Text I/O with 8-bit ASCII-compatible character set, using COME FROM:

<lang intercal> NOTE THIS IS INTERCAL

      PLEASE ,1 <- #5
      DO ,1 SUB #1 <- #54
      DO ,1 SUB #2 <- #192
      DO ,1 SUB #3 <- #136
      PLEASE ,1 SUB #4 <- #208
      DO ,1 SUB #5 <- #98
      DO COME FROM (1)
      DO READ OUT ,1

(2) DO ,1 SUB #1 <- #134 (1) PLEASE ABSTAIN FROM (2)</lang>

Io

<lang io>loop("SPAM" println)</lang>

J

<lang j>(-[smoutput bind 'SPAM')^:_(1)</lang>

Alternatively,

<lang j>smoutput bind 'SPAM'^:1e99 </lang>

This second implementation relies on numeric inaccuracies in IEEE floating point notation. For example, 1+1e98 is exactly equal to 1e98. That said, 1e98 iterations would still be significantly longer than the practical life of any machine anyone would care to dedicate to this task.

Java

<lang java>while(true){

  System.out.println("SPAM");

}</lang>

<lang java>for(;;){

  System.out.println("SPAM");

}</lang>

JavaScript

<lang javascript>for (;;) print("SPAM");</lang> <lang javascript>while (true) print("SPAM");</lang>

Joy

<lang joy>DEFINE loop == [true []] dip while.

["SPAM\n" putchars] loop.</lang>

jq

<lang jq>recurse("SPAM")</lang>

Output:

"SPAM"
"SPAM"
...

To suppress the quotation marks, invoke jq with the -r option.

Julia

<lang Julia> while true

   println("SPAM")

end </lang>

Output:

SPAM
SPAM
SPAM
SPAM
SPAM
SPAM
SPAM

and so on until ^C

K

<lang K> while[1; `0:"SPAM\n"]</lang>

LabVIEW

This image is a VI Snippet, an executable image of LabVIEW code. The LabVIEW version is shown on the top-right hand corner. You can download it, then drag-and-drop it onto the LabVIEW block diagram from a file browser, and it will appear as runnable, editable code.

Lang5

Lasso

<lang Lasso>// not wise to run this! while(1 > 0) => {^ 'SPAM\r' ^}</lang>

Liberty BASIC

<CTRL><Break> is used to terminate such loops. <lang lb> while 1

 print "SPAM"

wend end </lang>

Lisaac

{ "SPAM\n".print; }.endless_loop;

LiveCode

<lang LiveCode>repeat forever

 put "SPAM" & return

end repeat</lang>

Logo

<lang logo>forever [print "SPAM]</lang>

LOLCODE

<lang lolcode>HAI

 CAN HAS STDIO?
 IM IN YR LOOP 
   VISIBLE "SPAM"
 IM OUTTA YR LOOP

KTHXBYE</lang>

Lua

<lang lua> while true do

 print("SPAM")

end

--Another solution repeat

 print("SPAM")

until false </lang>

M4

<lang M4>define(`spam',`SPAM spam') spam</lang>

Make

<lang make>spam:

  @echo SPAM
  $(MAKE)</lang>

Maple

<lang Maple> > do print(SPAM) end; </lang>

Mathematica / Wolfram Language

<lang mathematica>While[True,

Print@"SPAM";
]</lang>

MATLAB / Octave

<lang Matlab>while true

   fprintf('SPAM\n')

end</lang>

Maxima

MAXScript

<lang maxscript>while true do print "SPAM\n"</lang>

Metafont

<lang metafont>forever: message "SPAM"; endfor end</lang>

МК-61/52

Note: because this device has no text output instead of "SPAM" was used the number (1234).

Modula-2

<lang modula2>LOOP

 InOut.WriteString ("SPAM");
 InOut.WriteLn

END;</lang>

Modula-3

<lang modula3>LOOP

 IO.Put("SPAM\n");

END;</lang>

Monte

<lang Monte> while (true):

   traceln("SPAM")

</lang>

MOO

<lang moo>while (1)

 player:tell("SPAM");

endwhile</lang>

MUMPS

FOR  WRITE "SPAM",!

</lang>

Nemerle

<lang Nemerle>while (true) WriteLine("SPAM");</lang> Or, using recursion: <lang Nemerle>def loop() : void {

   WriteLine("SPAM");
   loop();

}</lang>

NetRexx

<lang NetRexx>/* NetRexx */ options replace format comments java crossref savelog symbols nobinary

 say
 say 'Loops/Infinite'

 loop label spam forever
   say 'SPAM'
   end spam

</lang>

NewLISP

<lang NewLISP>(while (println "SPAM"))</lang>

Nim

<lang nim>while true:

 echo "SPAM"</lang>

Oberon-2

<lang oberon2> MODULE InfiniteLoop; IMPORT

 Out;

BEGIN

 LOOP
   Out.String("SPAM");Out.Ln
 END

END InfiniteLoop. </lang>

Objeck

<lang objeck> while(true) {

 "SPAM"->PrintLine();

}; </lang>

OCaml

<lang ocaml>while true do

 print_endline "SPAM"

done</lang>

or

<lang ocaml>let rec inf_loop() =

 print_endline "SPAM";
 inf_loop()

in inf_loop()</lang>

Seen like this it looks like the "too much functional" danger when a "while" loop looks far simpler, but the functional loop may be useful to provide data to the next loop without using mutable variable.

Occam

<lang occam>#USE "course.lib" PROC main (CHAN BYTE screen!)

 WHILE TRUE
   out.string("SPAM*c*n", 0, screen)

</lang>

Octave

<lang octave>while(1)

 disp("SPAM")

endwhile</lang>

Oforth

<lang Oforth>while(true) [ "SPAM" println ]</lang>

Oz

<lang oz>for do

  {Show 'SPAM'}

end</lang>

PARI/GP

<lang parigp>while(1,

 print("SPAM")

);</lang>

For a shorter version, note that print returns gnil which is evaluated as false. A 'cheating' solution might use print(SPAM) on the hope that the variable SPAM is uninitialized and hence prints as the monomial in itself. But with the ' operator that evaluation can be forced, regardless of the current value (if any) of that variable: <lang parigp>until(print('SPAM),)</lang>

Pascal

<lang pascal>while true do

 writeln('SPAM');</lang>

Alternatively: <lang pascal>repeat

 writeln('SPAM')

until false;</lang>

Perl

<lang perl>print "SPAM\n" while 1;</lang>

Perl 6

Works with: Rakudo Star version 2010.08

<lang perl6>loop {

   say 'SPAM';

}</lang> In addition, there are various ways of writing lazy, infinite lists in Perl 6: <lang perl6>print "SPAM\n" xx *; # repetition operator print "SPAM\n", ~* ... *; # sequence operator map {say "SPAM"}, ^Inf; # upto operator</lang>

PHP

<lang php>while(1)

   echo "SPAM\n";</lang>

PicoLisp

<lang PicoLisp>(loop (prinl "SPAM"))</lang>

Pike

<lang pike>int main(){

  while(1) write("SPAM\n");

}</lang>

PL/I

<lang PL/I> do forever;

  put list ('SPAM'); put skip;

end; </lang>

Pop11

<lang pop11>while true do

   printf('SPAM', '%p\n');

endwhile;</lang>

PostScript

PowerShell

<lang powershell>for () {

   "SPAM"

}</lang>

Prolog

<lang prolog>repeat, write('SPAM'), nl, fail.</lang>

Pure Data

Screenshot: https://i.imgur.com/IrwaafZ.png

<lang Pure Data>#N canvas 426 88 450 300 10;

X obj 17 75 print;
X msg 17 55 SPAM;
X obj 17 35 metro 1;
X msg 17 15 1;
X connect 1 0 0 0;
X connect 2 0 1 0;
X connect 3 0 2 0;</lang>

Notes: the loop is started by clicking the |1(, a [loadbang] could additionally be used. An [until] object, sent a bang, will loop forever, but will hang Pure Data, whereas a high-speed metro will function perfectly.

PureBasic

Repeat/Forever

<lang PureBasic>Repeat

 PrintN("SPAM")

ForEver</lang>

Goto

<lang PureBasic>PrintIt: PrintN("SPAM") Goto PrintIt</lang>

Python

<lang python>while 1:

  print "SPAM"</lang>

Note: one can also use: "True" or any other non-false value. In Python the following values are false: 0, "" (empty string), (,) and {} and [] (empty tuples, dictionaries or lists), None (the special object), and the False object. Any non-empty collection or string or non-zero numeric value is considered "True". However, according to Python Wiki, for Python versions 2.3+ this variant is optimized by the interpreter and thus is the fastest.

R

Note that the default R Gui buffers outputs before pushing them to the screen. To see this run either run in terminal mode, right click on the GUI window and deselect "Buffered Output" prior to execution, or add a call to flush.console() in the loop.

<lang R>repeat print("SPAM")</lang>

Racket

lang racket

Using recursion

(define (loop)

 (displayln "SPAM")
 (loop))

(loop)

Using a for loop

(for ([i (in-naturals)])

 (displayln "SPAM"))

</lang>

REBOL

<lang REBOL>forever [print "SPAM"]</lang>

Retro

<lang Retro>[ "SPAM\n" puts -1 ] while</lang>

REXX

simple

<lang rexx>/*REXX program displays the word SPAM forever. */

 do forever
 say 'SPAM'
 end   /*DO forever*/
                                      /*control will never reach here. */
                                      /*don't stick a fork in it.      */</lang>

esoteric

<lang rexx>/*REXX program displays the word SPAM forever. */

  do  while  1==1                      /*esoteric  "forever"  clause.   */
  say 'SPAM'
  end   /*DO while 1==1*/
                                       /*control will never reach here. */
                                       /*don't stick a fork in it.      */</lang>

GO TO version

<lang rexx>/*REXX program displays the word SPAM forever. */

tell_it: say 'SPAM' signal tell_it /*REXX's version of a GO TO */

                                      /*control will never reach here. */
                                      /*don't stick a fork in it.      */</lang>

too clever by half

<lang rexx>/*REXX program displays the word SPAM forever. */

 do  until  0>1                       /*too-clever-by-half forever loop*/
 say 'SPAM'
 end   /*DO until 0>1*/
                                      /*control will never reach here. */
                                      /*don't stick a fork in it.      */</lang>

Ruby

Rust

<lang rust>fn main() { loop { println!("SPAM"); } }</lang>

Run BASIC

<lang runbasic>[loop] print "Spam" :goto [loop]

while 1 print "Spam" wend</lang>

Salmon

<lang Salmon>while (true)

   "SPAM"!;</lang>

Sather

<lang sather>class MAIN is

 main is
   loop 
     #OUT + "Spam\n"; 
   end;
 end;

end;</lang>

Scala

<lang scala>while (true)

 println("SPAM")</lang>

Scheme

<lang scheme>((lambda (x) (display "SPAM") (newline) (x x))

(lambda (x) (display "SPAM") (newline) (x x)))

</lang>

or, less Schemishly but with less redundancy:

<lang scheme>(do () (#f) (display "SPAM") (newline))</lang>

Scilab

Works with: Scilab version 5.5.1

<lang>while %T

   printf("SPAM\n")

end</lang>

Output:

SPAM
SPAM
SPAM
SPAM
...

sed

<lang sed>:loop s/.*/SPAM/ p t loop</lang> Sed requires at least one line of input to execute, so run as follows:

echo | sed ':loop;s/.*/SPAM/;p;t loop'

Seed7

<lang seed7>$ include "seed7_05.s7i";

const proc: main is func

 begin
   while TRUE do
     writeln("SPAM");
   end while;
 end func;</lang>

Self

<lang self>['SPAM' printLine] loop</lang>

Sidef

Slate

<lang slate>[inform: 'SPAM'] loop</lang>

Smalltalk

<lang smalltalk>[ true ] whileTrue: [ 'SPAM' displayNl ]</lang>

SNOBOL4

<lang snobol>loop output = "SPAM" :(loop) end</lang>

SNUSP

<lang snusp>@\>@\>@\>@\>++++++++++===!/ < < < < \

|  |  |  \M=@@@@+@+++++# \.>.>.>.>./
|  |  \A=@@+@@@@+++#
|  \P=@@+@@+@@+++#
\S=@@+@+@@@+++#</lang>

Sparkling

<lang sparkling>while true {

   print("SPAM");

}</lang>

or

<lang sparkling>do {

   print("SPAM");

} while true;</lang>

or

<lang sparkling>for var b = true; b; b = true {

   printf("SPAM\n");

}</lang>

etc.

Standard ML

<lang sml>while true do

 print "SPAM\n";</lang>

or

<lang sml>let

 fun inf_loop () = (
   print "SPAM\n";
   inf_loop ()
 )

in

 inf_loop ()

end</lang>

Seen like this it looks like the "too much functional" danger when a "while" loop looks far simpler, but the functional loop may be useful to provide data to the next loop without using mutable variable.

Swift

<lang swift>while true {

   println("SPAM")

}</lang>

SystemVerilog

<lang SystemVerilog>program main;

 initial forever $display("SPAM");

endprogram </lang>

Transact-SQL

<lang sql>WHILE 1=1 BEGIN

PRINT "SPAM"

END</lang>

Tcl

<lang tcl>while true {

   puts SPAM

}

or

for {} 1 {} {

   puts SPAM

}</lang>

TI-83 BASIC

There are a few ways to achieve this in TI-83 BASIC

 :Lbl 1
 :Disp "SPAM
 :Goto 1

</lang>

Another way is by using a While loop

 :While 1
 :Disp "SPAM
 :End

</lang>

TI-89 BASIC

<lang ti89b>Loop

 Disp "SPAM"

EndLoop</lang>

TorqueScript

<lang Torque>While(1)

   echo("SPAM");</lang>

Trith

<lang trith>["SPAM" print] loop</lang>

TUSCRIPT

TUSCRIPT has no infinite loop. 999999999 loops are the limit. <lang tuscript> $$ MODE TUSCRIPT LOOP/999999999 print "spam" ENDLOOP </lang>

UNIX Shell

Works with: Bourne Shell

Use any of these loops: <lang bash>while :; do echo SPAM; done</lang>

<lang bash>while true; do echo "SPAM"; done</lang>

<lang bash>until false; do echo "SPAM"; done</lang>

Works with: bash

Works with: ksh93

Works with: zsh

C Shell

<lang bash>while (1) echo SPAM end</lang>

es

<lang es>forever {echo SPAM}</lang>

UnixPipes

Unlambda

V

<lang v>true [

  'SPAM' puts

] while</lang>

Vala

<lang vala>for(;;) stdout.printf("SPAM\n");</lang> <lang vala>while(true) stdout.printf("SPAM\n");</lang> <lang vala>do stdout.printf("SPAM\n"); while(true);</lang>

Vedit macro language

<lang vedit>while (1) {

   Message("Spam\n")

}</lang> or: <lang vedit>do {

   Message("Spam\n")

} while (1)</lang> or: <lang vedit>for (;1;) {

   Message("Spam\n")

}</lang> "Nearly infinite" loop can be done by using constant ALL (=1073741824) as repeat count: <lang vedit>Repeat (ALL) {

   Message("Spam\n")

}</lang>

Visual Basic

<lang vb>Do

   Debug.Print("SPAM")

Loop</lang>

Visual Basic .NET

Platform: .NET

Works with: Visual Basic .NET version 9.0+

<lang vbnet>Do

   Console.WriteLine("SPAM")

Loop</lang>

Wart

<lang wart>repeat :forever

 prn "spam"</lang>

X86 Assembly

Works with: NASM version Linux

<lang asm> section .text global _start

_start: mov edx, len mov ecx, msg mov ebx, 1 mov eax, 4 int 0x80 jmp _start

section .data msg db "SPAM",0xa len equ $-msg </lang>

XPL0

Z80 Assembly

Using the Amstrad CPC firmware:

<lang z80>org $4000

txt_output: equ $bb5a

start: ld hl,spam

print: ld a,(hl) cp 0 jr z,start call txt_output inc hl jr print

spam: defm "SPAM\r\n\0"</lang>

zkl

<lang zkl>while(1) { println("SPAM") } while(True){ println("SPAM") } foreach _ in ([0..]){ println("SPAM") } [0..].pump(Console.println,T(Void,"SPAM")); [0..].pump(fcn{ println("SPAM") }); fcn{ println("SPAM"); return(self.fcn()) }(); // tail recursive lambda</lang>