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<a name="Inserting-a-Hashsign"></a>
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Previous: <a href="Inserting-a-Backslash.html#Inserting-a-Backslash" accesskey="p" rel="prev">Inserting a Backslash</a>, Up: <a href="Special-Characters.html#Special-Characters" accesskey="u" rel="up">Special Characters</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html#Command-and-Variable-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="Inserting-_0060_0023_0027-with-_0040hashchar_007b_007d"></a>
<h4 class="subsection">12.1.5 Inserting &lsquo;#&rsquo; with <code>@hashchar{}</code></h4>

<a name="index-hashchar_007b_007d-_0028literal-_0023_0029"></a>
<a name="index-Inserting-_0023"></a>
<a name="index-Hash-sign_002c-inserting"></a>

<p>Ordinarily, a hash &lsquo;#&rsquo; is a normal character in Texinfo that can be
simply typed in your input where you need it.  The result is to
typeset the hash character from the current font.
</p>
<a name="index-Number-sign_002c-inserting"></a>
<a name="index-Octotherp_002c-inserting"></a>
<a name="index-Sharp-sign-_0028not_0029_002c-inserting"></a>
<p>This character has many other names, varying by locale, such as
&ldquo;number sign&rdquo;, &ldquo;pound&rdquo;, and &ldquo;octothorp&rdquo;.  It is also sometimes
called &ldquo;sharp&rdquo; or &ldquo;sharp sign&rdquo; since it vaguely resembles the
musical symbol by that name.  In situations where Texinfo is used,
&ldquo;hash&rdquo; is the most common in our experience.
</p>
<p>However, Texinfo uses the hash character as a special character in one
restricted context: to introduce the so-called <code>#line</code> directive
and variants (see <a href="External-Macro-Processors.html#External-Macro-Processors">External Macro Processors</a>).
</p>
<p>So, in order to typeset an actual hash character in such a place (for
example, in a program that needs documentation about <code>#line</code>),
it&rsquo;s necessary to use <code>@hashchar{}</code> or some other construct.
Here&rsquo;s an example:
</p>
<div class="example">
<pre class="example">@hashchar{} 10 &quot;example.c&quot;
</pre></div>

<p>Although &lsquo;<samp>@hashchar{}</samp>&rsquo; can be used nearly anywhere, there
is no need for it anywhere except this unusual case.
</p>




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