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<a name="Names"></a>
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Next: <a href="Quoted-strings.html#Quoted-strings" accesskey="n" rel="next">Quoted strings</a>, Up: <a href="Syntax.html#Syntax" accesskey="u" rel="up">Syntax</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p>
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<a name="Macro-names"></a>
<h3 class="section">3.1 Macro names</h3>
<a name="index-names"></a>
<a name="index-words"></a>
<p>A name is any sequence of letters, digits, and the character ‘<samp>_</samp>’
(underscore), where the first character is not a digit. <code>m4</code> will
use the longest such sequence found in the input. If a name has a
macro definition, it will be subject to macro expansion
(see <a href="Macros.html#Macros">Macros</a>). Names are case-sensitive.
</p>
<p>Examples of legal names are: ‘<samp>foo</samp>’, ‘<samp>_tmp</samp>’, and ‘<samp>name01</samp>’.
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