<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- This manual is for GNU Texinfo (version 6.7, 23 September 2019),
a documentation system that can produce both online information and a
printed manual from a single source using semantic markup.
Copyright (C) 1988, 1990, 1991, 1992, 1993, 1995, 1996, 1997,
1998, 1999, 2001, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Free Software
Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts. A copy of the license is included in the section entitled
"GNU Free Documentation License". -->
<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Inserting a Hashsign (GNU Texinfo 6.7)</title>
<meta name="description" content="Inserting a Hashsign (GNU Texinfo 6.7)">
<meta name="keywords" content="Inserting a Hashsign (GNU Texinfo 6.7)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2any">
<link href="index.html" rel="start" title="Top">
<link href="Command-and-Variable-Index.html" rel="index" title="Command and Variable Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Special-Characters.html" rel="up" title="Special Characters">
<link href="Inserting-an-Ampersand.html" rel="next" title="Inserting an Ampersand">
<link href="Inserting-a-Backslash.html" rel="prev" title="Inserting a Backslash">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>
</head>
<body lang="en">
<span id="Inserting-a-Hashsign"></span><div class="header">
<p>
Next: <a href="Inserting-an-Ampersand.html" accesskey="n" rel="next">Inserting an Ampersand</a>, Previous: <a href="Inserting-a-Backslash.html" accesskey="p" rel="prev">Inserting a Backslash</a>, Up: <a href="Special-Characters.html" accesskey="u" rel="up">Special Characters</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<span id="Inserting-_0060_0023_0027-with-_0040hashchar_007b_007d"></span><h4 class="subsection">12.1.5 Inserting ‘#’ with <code>@hashchar{}</code></h4>
<span id="index-hashchar_007b_007d-_0028literal-_0023_0029"></span>
<span id="index-Inserting-_0023"></span>
<span id="index-Hash-sign_002c-inserting"></span>
<p>Ordinarily, a hash ‘#’ 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>
<span id="index-Number-sign_002c-inserting"></span>
<span id="index-Octotherp_002c-inserting"></span>
<span id="index-Sharp-sign-_0028not_0029_002c-inserting"></span>
<p>This character has many other names, varying by locale, such as
“number sign”, “pound”, and “octothorp”. It is also sometimes
called “sharp” or “sharp sign” since it vaguely resembles the
musical symbol by that name. In situations where Texinfo is used,
“hash” 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</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’s necessary to use <code>@hashchar{}</code> or some other construct.
Here’s an example:
</p>
<div class="example">
<pre class="example">@hashchar{} 10 "example.c"
</pre></div>
<p>Although ‘<samp>@hashchar{}</samp>’ can be used nearly anywhere, there
is no need for it anywhere except this unusual case.
</p>
</body>
</html>