help/info/not.html

   1 <!--
   2  Copyright (c) 2000-2014 Ericsson Telecom AB
   3
   4  All rights reserved. This program and the accompanying materials
   5  are made available under the terms of the Eclipse Public License v1.0
   6  which accompanies this distribution, and is available at
   7  http://www.eclipse.org/legal/epl-v10.html
   8  -->
   9 <html>
  10 <head>
  11 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  12 <meta http-equiv="Content-Language" content="en-us">
  13 <title>not</title>
  14 </head>
  15 <body bgcolor="#DAD3C5" vlink="#0094D2" link="#003258">
  16 <table align="left" border="0" cellspacing="0" cellpadding="0" valign=top>
  17   <tr>
  18     <td width=105 height=40><a href="https://projects.eclipse.org/projects/tools.titan"><img src="../images/titan_transparent.gif" border=0 width=105 height=40 align="left" alt="Titan"></a></td>
  19   </tr>
  20 </table>
  21 <table border="0" align="right" cellpadding="0" cellspacing="0">
  22   <tr>
  23     <td><a href="../titan_main.html" alt="contents"><img border="0" src="../images/ao.jpg" width="53" height="40"></a></td>
  24     <td><a href="../titan_index.html" alt="index"><img border="0" src="../images/up.jpg" width="53" height="40"></a></td>
  25     <td><a href="none.html" alt="previous"><img border="0" src="../images/left.jpg" width="53" height="40"></a></td>
  26     <td><a href="not4b.html" alt="next"><img border="0" src="../images/right.jpg" width="53" height="40"></a></td>
  27   </tr>
  28 </table>
  29 <p><br clear="all">
  30 </p>
  31 <hr>
  32 <h1>not</h1>
  33 <hr align="left" width="75%">
  34 <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>
  35 <p>Related keywords:</p>
  36 <ul>
  37   <li><a href="boolean.html"><b><font face="Courier New" color="#003258" size="4">boolean</font></b></a></li>
  38   <li><a href="and.html"><b><font face="Courier New" color="#003258" size="4">and</font></b></a></li>
  39   <li><a href="or.html"><b><font face="Courier New" color="#003258" size="4">or</font></b></a></li>
  40   <li><a href="xor.html"><b><font face="Courier New" color="#003258" size="4">xor</font></b></a></li>
  41   <li><a href="true.html"><b><font face="Courier New" color="#003258" size="4">true</font></b></a></li>
  42   <li><a href="false.html"><b><font face="Courier New" color="#003258" size="4">false</font></b></a></li>
  43 </ul>
  44 <hr align="left" width="50%">
  45 <div align="center">
  46 <center>
  47 <table border="0" width="90%" bgcolor="#FFB599" cellpadding="4">
  48   <tr>
  49     <td width="100%">
  50     <h3 align="center"><font face="Courier New" color="#003258" size="5"><b>not</b></font></h3>
  51     </td>
  52   </tr>
  53 </table>
  54 </center>
  55 </div>
  56 <hr align="left" width="50%">
  57 <p>Example 1:
  58 <p><font face="Courier New">const boolean c_malign := false; </font> <br>
  59 <font face="Courier New">var boolean v_contraire := not c_malign; </font>
  60 <p>The varaible v_contraire will have the initial value true.</p>
  61 <hr align="left" width="25%">
  62 <p><a HREF="BNF.html#notexpression">BNF definition</a> of <font face="Courier New">not</font></p>
  63 </body>
  64 </html>