<!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>Conditionals (GNU Texinfo 6.7)</title>
<meta name="description" content="Conditionals (GNU Texinfo 6.7)">
<meta name="keywords" content="Conditionals (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="index.html" rel="up" title="Top">
<link href="Conditional-Commands.html" rel="next" title="Conditional Commands">
<link href="_0040documentencoding.html" rel="prev" title="@documentencoding">
<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="Conditionals"></span><div class="header">
<p>
Next: <a href="Defining-New-Texinfo-Commands.html" accesskey="n" rel="next">Defining New Texinfo Commands</a>, Previous: <a href="Internationalization.html" accesskey="p" rel="prev">Internationalization</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</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="Conditionally-Visible-Text"></span><h2 class="chapter">16 Conditionally Visible Text</h2>
<span id="index-Conditionally-visible-text"></span>
<span id="index-Text_002c-conditionally-visible"></span>
<span id="index-Visibility-of-conditional-text"></span>
<span id="index-If-text-conditionally-visible"></span>
<p>The <em>conditional commands</em> allow you to use different text for
different output formats, or for general conditions that you define.
For example, you can use them to specify different text for the
printed manual and the Info output.
</p>
<p>The conditional commands comprise the following categories.
</p>
<ul>
<li> Commands specific to an output format (Info, TeX, HTML, …).
</li><li> Commands specific to any output format <em>excluding</em> a given
one (e.g., not Info, not TeX, …).
</li><li> ‘Raw’ formatter text for any output format, passed straight
through with minimal (but not zero) interpretation of @-commands.
</li><li> Format-independent variable substitutions, and testing if a variable
is set or clear.
</li></ul>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">• <a href="Conditional-Commands.html" accesskey="1">Conditional Commands</a></td><td> </td><td align="left" valign="top">Text for a given format.
</td></tr>
<tr><td align="left" valign="top">• <a href="Conditional-Not-Commands.html" accesskey="2">Conditional Not Commands</a></td><td> </td><td align="left" valign="top">Text for any format other than a given one.
</td></tr>
<tr><td align="left" valign="top">• <a href="Raw-Formatter-Commands.html" accesskey="3">Raw Formatter Commands</a></td><td> </td><td align="left" valign="top">Using raw formatter commands.
</td></tr>
<tr><td align="left" valign="top">• <a href="Inline-Conditionals.html" accesskey="4">Inline Conditionals</a></td><td> </td><td align="left" valign="top">Brace-delimited conditional text.
</td></tr>
<tr><td align="left" valign="top">• <a href="_0040set-_0040clear-_0040value.html" accesskey="5"><code>@set @clear @value</code></a></td><td> </td><td align="left" valign="top">Variable tests and substitutions.
</td></tr>
<tr><td align="left" valign="top">• <a href="Testing-for-Texinfo-Commands.html" accesskey="6">Testing for Texinfo Commands</a></td><td> </td><td align="left" valign="top">Testing if a Texinfo command is available.
</td></tr>
<tr><td align="left" valign="top">• <a href="Conditional-Nesting.html" accesskey="7">Conditional Nesting</a></td><td> </td><td align="left" valign="top">Using conditionals inside conditionals.
</td></tr>
</table>
</body>
</html>