Editing GNU Assembler (section)

===Comments===
GAS supports two comment styles.<ref>{{cite web|last=Red Hat Inc.|title=Using as|url=http://sources.redhat.com/binutils/docs-2.12/as.info/Comments.html#Comments|access-date=Jan 10, 2013|archive-date=June 20, 2011|archive-url=https://web.archive.org/web/20110620054223/http://sources.redhat.com/binutils/docs-2.12/as.info/Comments.html#Comments|url-status=dead}}</ref>

'''Multi-line'''

As in C, multi-line comments start and end with mirroring slash-asterisk pairs:
<syntaxhighlight lang="c">
/* 
comment
*/
</syntaxhighlight>

'''Single-line'''

Single line comments have a few different formats varying on which architecture is being assembled for.
* A [[hash symbol]] (#) — [[i386]], [[x86-64]], [[i960]], [[68HC11]], [[68HC12]], [[VAX]], [[V850]], [[M32R]], [[PowerPC]], [[MIPS architecture|MIPS]], [[Motorola 68000 series|M680x0]], and [[RISC-V]]
* A [[semicolon]] (;) — [[AMD 29k]] family, [[Advanced RISC Computing|ARC]], [[H8/300]] family, [[PA-RISC|HPPA]], [[PDP-11]], [[picoJava]], Motorola, and [[M32C]]
* The [[at sign]] (@) — 32-bit [[ARM architecture|ARM]]
* A double [[Slash (punctuation)|slash]] (//) — [[AArch64]]
* A [[vertical bar]] (|) — [[Motorola 68000 series|M680x0]]
* An [[exclamation mark]] (!) — [[SuperH|Renesas SH]]