69 lines
3.1 KiB
HTML
69 lines
3.1 KiB
HTML
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<html lang="en">
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<head>
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<title>Symbol Intro - Using as</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Syntax.html#Syntax" title="Syntax">
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<link rel="prev" href="Comments.html#Comments" title="Comments">
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<link rel="next" href="Statements.html#Statements" title="Statements">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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-->
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<meta http-equiv="Content-Style-Type" content="text/css">
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<style type="text/css"><!--
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pre.display { font-family:inherit }
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pre.format { font-family:inherit }
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pre.smalldisplay { font-family:inherit; font-size:smaller }
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pre.smallformat { font-family:inherit; font-size:smaller }
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pre.smallexample { font-size:smaller }
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pre.smalllisp { font-size:smaller }
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span.sc { font-variant:small-caps }
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span.roman { font-family:serif; font-weight:normal; }
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span.sansserif { font-family:sans-serif; font-weight:normal; }
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="Symbol-Intro"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Statements.html#Statements">Statements</a>,
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Previous: <a rel="previous" accesskey="p" href="Comments.html#Comments">Comments</a>,
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Up: <a rel="up" accesskey="u" href="Syntax.html#Syntax">Syntax</a>
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<hr>
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</div>
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<h3 class="section">3.4 Symbols</h3>
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<p><a name="index-characters-used-in-symbols-130"></a>A <dfn>symbol</dfn> is one or more characters chosen from the set of all
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letters (both upper and lower case), digits and the three characters
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‘<samp><span class="samp">_.$</span></samp>’.
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On most machines, you can also use <code>$</code> in symbol names; exceptions
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are noted in <a href="Machine-Dependencies.html#Machine-Dependencies">Machine Dependencies</a>.
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No symbol may begin with a digit. Case is significant.
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There is no length limit; all characters are significant. Multibyte characters
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are supported. Symbols are delimited by characters not in that set, or by the
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beginning of a file (since the source program must end with a newline, the end
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of a file is not a possible symbol delimiter). See <a href="Symbols.html#Symbols">Symbols</a>.
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<p>Symbol names may also be enclosed in double quote <code>"</code> characters. In such
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cases any characters are allowed, except for the NUL character. If a double
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quote character is to be included in the symbol name it must be preceeded by a
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backslash <code>\</code> character.
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<a name="index-length-of-symbols-131"></a>
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</body></html>
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