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<title>not</title>
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<h1>not</h1>
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<p>The keyword <b><font face="Courier New">not</font></b> is the unary operator that returns the value true if its operand is false and returns the value false if the operand is true.</p>
<p>Related keywords:</p>
<ul>
<li><a href="boolean.html"><b><font face="Courier New" color="#003258" size="4">boolean</font></b></a></li>
<li><a href="and.html"><b><font face="Courier New" color="#003258" size="4">and</font></b></a></li>
<li><a href="or.html"><b><font face="Courier New" color="#003258" size="4">or</font></b></a></li>
<li><a href="xor.html"><b><font face="Courier New" color="#003258" size="4">xor</font></b></a></li>
<li><a href="true.html"><b><font face="Courier New" color="#003258" size="4">true</font></b></a></li>
<li><a href="false.html"><b><font face="Courier New" color="#003258" size="4">false</font></b></a></li>
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<h3 align="center"><font face="Courier New" color="#003258" size="5"><b>not</b></font></h3>
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<p>Example 1:
<p><font face="Courier New">const boolean c_malign := false; </font> <br>
<font face="Courier New">var boolean v_contraire := not c_malign; </font>
<p>The varaible v_contraire will have the initial value true.</p>
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<p><a HREF="BNF.html#notexpression">BNF definition</a> of <font face="Courier New">not</font></p>
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