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Edit File: _0040set-_0040clear-_0040value.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <!-- Created by GNU Texinfo 6.8, https://www.gnu.org/software/texinfo/ --> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <!-- This manual is for GNU Texinfo (version 6.8, 8 June 2021), a documentation system that can produce both online information and a printed manual from a single source using semantic markup. Copyright (C) 1988, 1990-1993, 1995-1999, 2001-2021 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". --> <title>@set @clear @value (GNU Texinfo 6.8)</title> <meta name="description" content="@set @clear @value (GNU Texinfo 6.8)"> <meta name="keywords" content="@set @clear @value (GNU Texinfo 6.8)"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="texi2any"> <meta name="viewport" content="width=device-width,initial-scale=1"> <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="Conditionals.html" rel="up" title="Conditionals"> <link href="Testing-for-Texinfo-Commands.html" rel="next" title="Testing for Texinfo Commands"> <link href="Inline-Conditionals.html" rel="prev" title="Inline Conditionals"> <style type="text/css"> <!-- a.copiable-anchor {visibility: hidden; text-decoration: none; line-height: 0em} a.summary-letter {text-decoration: none} blockquote.indentedblock {margin-right: 0em} div.display {margin-left: 3.2em} div.example {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} span:hover a.copiable-anchor {visibility: visible} ul.no-bullet {list-style: none} --> </style> </head> <body lang="en"> <div class="section" id="g_t_0040set-_0040clear-_0040value"> <div class="header"> <p> Next: <a href="Testing-for-Texinfo-Commands.html" accesskey="n" rel="next">Testing for Texinfo Commands: <code>@ifcommanddefined</code>, <code>@ifcommandnotdefined</code></a>, Previous: <a href="Inline-Conditionals.html" accesskey="p" rel="prev">Inline Conditionals: <code>@inline</code>, <code>@inlineifelse</code>, <code>@inlineraw</code></a>, Up: <a href="Conditionals.html" accesskey="u" rel="up">Conditionally Visible Text</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="Flags_003a-_0040set_002c-_0040clear_002c-conditionals_002c-and-_0040value"></span><h3 class="section">15.5 Flags: <code>@set</code>, <code>@clear</code>, conditionals, and <code>@value</code></h3> <span id="set-clear-value"></span><p>You can direct the Texinfo formatting commands to format or ignore parts of a Texinfo file with the <code>@set</code>, <code>@clear</code>, <code>@ifset</code>, and <code>@ifclear</code> commands. </p> <p>Here are brief descriptions of these commands, see the following sections for more details: </p> <dl compact="compact"> <dt><span><code>@set <var>flag</var> [<var>value</var>]</code></span></dt> <dd><p>Set the variable <var>flag</var>, to the optional <var>value</var> if specified. </p> </dd> <dt><span><code>@clear <var>flag</var></code></span></dt> <dd><p>Undefine the variable <var>flag</var>, whether or not it was previously defined. </p> </dd> <dt><span><code>@ifset <var>flag</var></code></span></dt> <dd><p>If <var>flag</var> is set, text through the next <code>@end ifset</code> command is formatted. If <var>flag</var> is clear, text through the following <code>@end ifset</code> command is ignored. </p> </dd> <dt><span><code>@inlineifset{<var>flag</var>, <var>text</var>}</code></span></dt> <dd><p>Brace-delimited version of <code>@ifset</code>. </p> </dd> <dt><span><code>@ifclear <var>flag</var></code></span></dt> <dd><p>If <var>flag</var> is set, text through the next <code>@end ifclear</code> command is ignored. If <var>flag</var> is clear, text through the following <code>@end ifclear</code> command is formatted. </p> </dd> <dt><span><code>@inlineifclear{<var>flag</var>, <var>text</var>}</code></span></dt> <dd><p>Brace-delimited version of <code>@ifclear</code>. </p> </dd> </dl> <ul class="section-toc"> <li><a href="_0040set-_0040value.html" accesskey="1"><code>@set</code> and <code>@value</code></a></li> <li><a href="_0040ifset-_0040ifclear.html" accesskey="2"><code>@ifset</code> and <code>@ifclear</code></a></li> <li><a href="_0040inlineifset-_0040inlineifclear.html" accesskey="3"><code>@inlineifset</code> and <code>@inlineifclear</code></a></li> <li><a href="_0040value-Example.html" accesskey="4"><code>@value</code> Example</a></li> </ul> </div> </body> </html>