Loops/Infinite: Difference between revisions

=={{header|11l}}==

=={{header|360 Assembly}}==

This for sure will result in a severe WTO buffer shortage.

INFINITE CSECT , this PGM control section

INFINITE AMODE 31 addressing mode 31 bit

RETURN PR , return to caller

END INFINITE

=={{header|4DOS Batch}}==

do forever

echo SPAM

=={{header|6502 Assembly}}==

Specific OS/hardware routines for printing are left unimplemented.

PrintLoop: LDA MSG,x

JSR PrintAccumulator ;routine not implemented

BEQ InfiniteLoop

=={{header|6800 Assembly}}==

.tf spam6800.obj,AP1

.lf spam6800

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

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

=={{header|68000 Assembly}}==

Hardware-specific routines for I/O are left unimplemented and just displayed as a subroutine, as this is not the focus of the task.

LEA Message,A0

JSR PrintString

Message:

DC.B "SPAM",13,10,0

=={{header|8086 Assembly}}==

{{works with|https://www.dosbox.com DOSBox}}

===Loading Immediates===

mov ah,02h

mov dl,'S' ;VASM replaces a character in single quotes with its ascii equivalent

int 21h

===Loading From A Data Source===

mov ax, seg SpamMessage ;load into ax whatever segment the address of our message is in.

mov ds, ax ;segment registers on the original 8086 must be loaded from a register

jmp SpamInner

=={{header|8th}}==

One way:

: inf "SPAM\n" . recurse ;

Another way:

: inf repeat "SPAM\n" . again ;

=={{header|AArch64 Assembly}}==

{{works with|as|Raspberry Pi 3B version Buster 64 bits}}

/* ARM assembly AARCH64 Raspberry PI 3B */

/* program infinite64.s */

/* for this file see task include a file in language AArch64 assembly */

.include "../includeARM64.inc"

=={{header|ACL2}}==

(declare (xargs :mode :program))

(if nil

nil

(prog2$ (cw "SPAM~%")

=={{header|Action!}}==

DO

PrintE("SPAM")

OD

{{out}}

[https://gitlab.com/amarok8bit/action-rosetta-code/-/raw/master/images/Infinite.png Screenshot from Atari 8-bit computer]

=={{header|ActionScript}}==

trace("SPAM");

=={{header|Ada}}==

Put_Line("SPAM");

=={{header|Agena}}==

Tested with Agena 2.9.5 Win32

print( "SPAM" )

=={{header|Aime}}==

o_text("SPAM\n");

=={{header|ALGOL 60}}==

'''end'''

{{works with|ALGOL 60|OS/360}}

'INTEGER' I;

'FOR' I := 1 'STEP' 0 'UNTIL' 2 'DO'

OUTSTRING(1,'('SPAM')')

=={{header|ALGOL 68}}==

printf($"SPAM"l$)

Or the classic "dynamic halt":

printf($"SPAM"l$);

=={{header|ALGOL W}}==

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

=={{header|AmigaE}}==

LOOP

WriteF('SPAM')

ENDLOOP

=={{header|AppleScript}}==

log "SPAM"

=={{header|ARM Assembly}}==

.global main

message:

.asciz "SPAM\n"

=={{header|ArnoldC}}==

STICK AROUND @NO PROBLEMO

TALK TO THE HAND "SPAM"

CHILL

=={{header|Arturo}}==

print "SPAM"

=={{header|AutoHotkey}}==

=={{header|AWK}}==

while(1) {

print "SPAM"

}

=={{header|Axe}}==

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

Disp "SPAM",i

=={{header|BASIC}}==

{{works with|QuickBasic|4.5}}

Old-fashioned syntax:

print "SPAM"

Standard BASIC:

print "SPAM"

Also

print "SPAM"

{{works with|Applesoft BASIC}}

The most intuitive method is to use the <code>GOTO</code> statement.

Generally, using <code>GOSUB</code> in place of <code>GOTO</code> is incorrect. Some programming bugs come about when a <code>GOSUB</code> causes a potentially infinite loop, however, eventually stack memory will fill up and cause a terminating error as shown in this Commodore BASIC example:

The solution is to keep the stack empty, however, this will also clear all variables used and prevent the use of <code>RETURN</code>ing from the "subroutine". This is accomplished with the <code>CLEAR</code> (or <code>CLR</code> in Commodore BASIC) placed at the start of the loop.

Rather than a <code>GOTO</code>, instead we can use a <code>FOR... NEXT</code> statement:

20 print "SPAM";

In most cases, we can also call the <code>RUN</code> command from within the program.

<code>IF... THEN</code> has an implied <code>GOTO</code> on some BASICs...

==={{header|Applesoft BASIC}}===

==={{header|BASIC256}}===

print "SPAM"

==={{header|Commodore BASIC}}===

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

110 PRINT "SPAM"

==={{header|QB64}}===

Do 'Alternatively this could have a conditional, "Do While 1"

Print "SPAM"

While 1

Print "SPAM"

==={{header|True BASIC}}===

PRINT "SPAM"

LOOP

==={{header|Yabasic}}===

print "SPAM"

O también

print "SPAM"

=={{header|Batch File}}==

Using <code>goto</code>:

:loop

echo SPAM

Another variant which uses Windows NT's <code>for</code> statement:

{{works with|Windows NT|4 or later}}

This essentially is a counted loop which starts at <code>1</code>, increments by <code>0</code> and stops when the counter reaches <code>2</code>.

=={{header|BBC BASIC}}==

PRINT "SPAM"

=={{header|bc}}==

=={{header|BCPL}}==

=={{header|beeswax}}==

=={{header|Befunge}}==

Because the 2-D code space is toroidal, all loops are infinite

unless explicitly stopped with '''@'''.

=={{header|blz}}==

print("SPAM")

=={{header|bootBASIC}}==

Using <code>goto</code>:

Using <code>run</code>:

=={{header|BQN}}==

The main way of performing an infinite loop in BQN is using recursion.

will likely end in a stack overflow.

=={{header|Bracmat}}==

=={{header|Brainf***}}==

Optimized for code size:

Optimized for execution speed:

[-> 8++++++++ > 8++++++++ > 6++++++ > 8++++++++ > 1+ <<<<<]>

83+++ > 80 > 65+++++ > 77--- <<<

=={{header|Brat}}==

=={{header|C}}==

or

or

or

or

spam: puts("SPAM");

goto spam;

=={{header|C sharp|C#}}==

{

Console.WriteLine("SPAM");

=={{header|C++}}==

{{trans|C}}

or

or

std::cout << "SPAM\n";

=={{header|Chapel}}==

=={{header|ChucK}}==

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

=={{header|Clojure}}==

=={{header|COBOL}}==

PROGRAM-ID. Spam.

GOBACK

[[OpenCOBOL]] supports a <code>FOREVER</code> clause for <code>PERFORM</code> which will have the same effect.

=={{header|CoffeeScript}}==

console.log 'SPAM'

=={{header|ColdFusion}}==

With tags:

SPAM

With script:

while( true != false )

{

writeOutput( "SPAM" );

}

=={{header|Comal}}==

PRINT "SPAM"

=={{header|Common Lisp}}==

=== Using DO ===

(do () ; Not initialization

(nil) ; Not break condition

(print "SPAM")) ; On every loop as requested

{{out}}

=={{header|Corescript}}==

:top

print Spam!

goto top

=={{header|Cowgol}}==

loop

print("Spam\n");

=={{header|Crystal}}==

puts "SPAM"

Using <code>while</code>/<code>until</code>:

puts "SPAM"

puts "SPAM"

Using an infinite range:

puts "SPAM"

=={{header|D}}==

Some common ways to create an infinite printing loop:

void main() {

while (true)

writeln("SPAM");

void main() {

writeln("SPAM");

while (true);

void main() {

for ( ; ; )

writeln("SPAM");

void main() {

writeln("SPAM");

goto LOOP;

=={{header|Dart}}==

main() {

while(true) {

}

}

=={{header|dc}}==

This loop is a tail-recursive function.

=={{header|DCL}}==

$ write sys$output "SPAM"

=={{header|Delphi}}==

=={{header|Draco}}==

while true do

writeln("SPAM")

od

=={{header|DWScript}}==

=={{header|Dyalect}}==

print("SPAM")

=={{header|Déjà Vu}}==

Infinite recursion thanks to tail calls:

!print "SPAM"

recurse

=={{header|E}}==

println("SPAM")

println("SPAM")

f <- ()

}

The difference between these is that in the second,

=={{header|EDSAC order code}}==

The EDSAC instruction set does not include an unconditional jump: it is necessary to synthesize it by using either an <code>E</code> "branch on accumulator sign bit clear" or <code>F</code> "branch on accumulator sign bit set" order, in circumstances where the condition is guaranteed to be met. For this specific task, guaranteeing it is trivial: printing characters does not change the contents of the accumulator at all. The solution presented here, however, is more general. We use a <code>T</code> "transfer and clear" order to store the accumulator's contents in storage address <i>θ</i>+17, then jump back to the beginning of the loop and reload the accumulator with an <code>A</code> "add" order. Note that the storage address used as a temporary variable should be set to zero on entry to the loop.

=============

[ 17 ] PF

=={{header|Ela}}==

===Direct Approach===

loop () = do

loop ()

===Non-strict version===

xs = "SPAM"::xs

takeit (num - 1) xs

=={{header|Elena}}==

ELENA 4.x:

{

while (true)

console.writeLine:"spam"

}

=={{header|Elixir}}==

def infinite do

IO.puts "SPAM"

end

or

=={{header|Emacs Lisp}}==

=={{header|Erlang}}==

-module (main).

-export ([main/0]).

io:fwrite( "SPAM~n" ),

main().

=={{header|ERRE}}==

LOOP

PRINT("SPAM")

END LOOP

You can use also WHILE TRUE..END WHILE or REPEAT...UNTIL FALSE loops.

=={{header|Euphoria}}==

while 1 do

puts(1, "SPAM\n")

end while

=={{header|F Sharp|F#}}==

// Imperative Solution

while true do

printfn "SPAM"

forever ()

=={{header|Factor}}==

Tail recursion:

Looping combinators:

=={{header|FALSE}}==

=={{header|Fantom}}==

class Main

{

}

}

=={{header|Fermat}}==

=={{header|Fish}}==

=={{header|Forth}}==

=={{header|Fortran}}==

FORTRAN 77

10 WRITE(*,*) 'SPAM'

GO TO 10

END

Fortran 90

program spam

implicit none

end do

end program spam

=={{header|Fortress}}==

component loops_infinite

export Executable

end

end

=={{header|FreeBASIC}}==

Do

Print "SPAM"

=={{header|Frink}}==

while true

println["SPAM"]

=={{header|FutureBasic}}==

Loop de loop -- whose great idea was this?

dispatchglobal

dispatchend

=={{header|Gambas}}==

'''[https://gambas-playground.proko.eu/?gist=e63dcdc939f8a7dcfd3194d884f8d4a5 Click this link to run this code]'''

Do

Loop

=={{header|GAP}}==

Print("SPAM\n");

=={{header|GB BASIC}}==

=={{header|GlovePIE}}==

GlovePIE does not natively support multiple lines of output. As such, this code continuously changes the single line of output to SPAM. The below code does this without specifying an infinite loop because all GlovePIE scripts loop indefinitely until the program is stopped.

=={{header|GML}}==

=={{header|Go}}==

import "fmt"

fmt.Printf("SPAM\n")

}

=={{header|Groovy}}==

println 'SPAM'

=={{header|Halon}}==

echo "SPAM";

or (due to optimizations, these are equally fast)

echo "SPAM";

=={{header|Hare}}==

export fn main() void = {

fmt::println("SPAM")!;

};

=={{header|Haskell}}==

or

=={{header|Haxe}}==

=={{header|hexiscript}}==

=={{header|HicEst}}==

WRITE() "SPAM"

=={{header|HolyC}}==

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

There are several ways to write infinite loops in Icon. The most straightforward would be with repeat.

repeat write("SPAM")

Alternately one could use one of these:

...

while write("SPAM") # always succeeds, needs failure to break

while write(|"SPAM") # this is a common mistake that results in an endless loop

...

=={{header|IDL}}==

=={{header|Intercal}}==

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

PLEASE ,1 <- #5

DO ,1 SUB #1 <- #54

DO READ OUT ,1

(2) DO ,1 SUB #1 <- #134

=={{header|Io}}==

=={{header|J}}==

Alternatively,

This second implementation relies on numeric inaccuracies in IEEE floating point notation.

=={{header|Java}}==

System.out.println("SPAM");

System.out.println("SPAM");

=={{header|JavaScript}}==

=={{header|Joy}}==

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

=={{header|jq}}==

{{Out}}

"SPAM"

=={{header|Jsish}}==

=={{header|Julia}}==

while true

println("SPAM")

end

{{out}}

<pre>

=={{header|K}}==

=={{header|Kotlin}}==

fun main(args: Array<String>) {

while (true) println("SPAM")

=={{header|LabVIEW}}==

=={{header|Lambdatalk}}==

{def loops_infinite

{lambda {}

{loops_infinite}

-> SPAM forever...

=={{header|Lang5}}==

=={{header|Lasso}}==

while(1 > 0) => {^

'SPAM\r'

=={{header|Liberty BASIC}}==

<CTRL><Break> is used to terminate such loops.

while 1

print "SPAM"

wend

end

=={{header|Lily}}==

while 1: print("SPAM")

=={{header|Lingo}}==

put "SPAM"

=={{header|Lisaac}}==

=={{header|LiveCode}}==

put "SPAM" & return

=={{header|Logo}}==

=={{header|LOLCODE}}==

CAN HAS STDIO?

IM IN YR LOOP

VISIBLE "SPAM"

IM OUTTA YR LOOP

=={{header|Lua}}==

while true do

print("SPAM")

print("SPAM")

until false

=={{header|M2000 Interpreter}}==

If Esc works then Ctrl + Y (and other letters except C, A, Z, X, N, M. F, L), open Control form, which we can do: Next Step, Slow Flow, Stop, and we can show code,current stack, variables, or execute immediate statements. This works only in console, not in M2000 forms.

Module CheckIt {

Print "SPAM"

}

Checkit

Using a Repeat (or Do) - Always block

Module CheckIt {

Repeat {

}

Checkit