<html><head><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>5.4.3.&nbsp;Boolean Constant</title><link href="style.css" rel="stylesheet" type="text/css"><meta content="DocBook XSL Stylesheets V1.72.0" name="generator"><link rel="start" href="index.html" title="The VIATRA2 Model Transformation Framework"><link rel="up" href="sec_ASMConstants.html" title="5.4.&nbsp;Constants"><link rel="prev" href="def_UndefinedValue.html" title="5.4.2.&nbsp;Undefined Value"><link rel="next" href="def_MultiplicityConstant.html" title="5.4.4.&nbsp;Multiplicity Constant"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">5.4.3.&nbsp;Boolean Constant</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="def_UndefinedValue.html">Prev</a>&nbsp;</td><th align="center" width="60%">5.4.&nbsp;Constants</th><td align="right" width="20%">&nbsp;<a accesskey="n" href="def_MultiplicityConstant.html">Next</a></td></tr></table><hr></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="def_BooleanConstant"></a>5.4.3.&nbsp;Boolean Constant</h4></div></div></div><div class="tip" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Tip: Description"><tr><td valign="top" align="center" rowspan="2" width="25"><img alt="[Tip]" src="images/tip.png"></td><th align="left"><a name="def_BooleanConstant_Description"></a>Description</th></tr><tr><td valign="top" align="left"><p>
A <span class="strong"><strong>boolean constant</strong></span>
<a name="N128A3" class="indexterm"></a> 
<a name="N128A8" class="indexterm"></a> 
is an ASM constant representing 
the logical <span class="emphasis"><em>true</em></span>and <span class="emphasis"><em>false</em></span>values. 
</p></td></tr></table></div><div class="important" style="margin-left: 0.5in; margin-right: 0.5in;"><table border="0" summary="Important: Syntax"><tr><td valign="top" align="center" rowspan="2" width="25"><img alt="[Important]" src="images/important.png"></td><th align="left"><a name="def_BooleanConstant_Syntax"></a>Syntax</th></tr><tr><td valign="top" align="left"><pre class="programlisting">
BooleanConstantAST ::= <span class="token">false</span> | <span class="token">true</span>
</pre><p>
A boolean constant can have two values: <code class="computeroutput">true</code>and <code class="computeroutput">false</code>. 
</p></td></tr></table></div><div class="highlights"><a name="def_BooleanConstant_DefinedIn"></a><p><b>Defined In:&nbsp;</b>
<a href="def_AsmConstant.html" title="5.4.1.&nbsp;ASM Constant (Value)">ASM constant</a>
</p></div><div class="highlights"><a name="def_BooleanConstant_UsedBy"></a><p><b>Used By:&nbsp;</b>
<a href="def_BaseLogicalTerm.html" title="5.2.3.&nbsp;Base Logical Term">base logical term</a>
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