x86 machine language... two bytes, represented as hex would look like this.

0xEB, 0xFE

If we disassemble that to assembly, we get:

jmp    -2

It seems no one writes software in C anymore, although it most probably won’t win. Anyways, for the sake of completeness:

int main(){while 1 printf("1\n");)

You will get a warning from the compiler because you don’t #include <stdio.h>, but it works.

Another solution is a good old .com file for DOS. These are executed as is, pure machine code. That would probably win as it is actually executable without any fancy interpreters. I guess it would take about 10 bytes or so.

Alright, let's see. ASM would work but move consumes 4 chars already.

I could run the code itself infinite times and print ASCII 31 0a (49 13? I guess. Idk) repeatedly. But that wouldn't be a programmatical loop.

><> (fish) works.

1n

That's it. Two chars.

Edit: I just realized, that just prints 1 repeatedly and doesn't add a newline. So..

1nao

4 chars. That should do it.

Edit2: Wait, did fish win this thing? I thought somebody would write some crazy machine-level code(which is highly unlikely; as I said, that would take 4 or more chars - just to print it) to nail this. Well, I guess ><> wins then.

You may find this helpful :D

codegolf.stackexchange.com/questions/59347/shorte…

The language is Python!! And my answer is this:

while 1:
    print 1

javascript
while(1) document.write('1<br>')

Update (15 char):
with(1)alert(1)
for(;;)alert(1)

I give you Python:

while 1:0

In Brainfuck:

1. >+++[->+++<]>+  incrementing third cell to 10 'LF'
2. <<+++++++[->+++++++<]  incrementing second cell to 49 '1'
3. +[-+>.>.<<]  looping

My answer

In PHP

<?for(;;)echo"1\n";

-> 19 chars

I will take the easy picking of PHP

<?php while (true) echo "1\n";

and for fun

<?php a: echo "1\n"; goto a;