help/info/boolean.html

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  13 <title>boolean</title>
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  32 <h1>boolean</h1>
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  34 <p>The boolean keyword denotes a simple basic type consisting of two distinguished values namely <a href="true.html"><b>true</b></a> or <a href="false.html"><b>false</b></a>.</p>
  35 <ul>
  36   <li>A Boolean expression containing logical operators (<font face="Courier New"><b>and</b></font>, <font face="Courier New"><b>not</b></font>, <font face="Courier New"><b>or</b></font>, <font
  37     face="Courier New"><b>xor</b></font>) shall resolve to a value of type Boolean.</li>
  38 </ul>
  39 <p>Related keywords:</p>
  40 <ul>
  41   <li><a href="and.html"><b><font face="Courier New" color="#003258" size="4">and</font></b></a></li>
  42   <li><a href="not.html"><b><font face="Courier New" color="#003258" size="4">not</font></b></a></li>
  43   <li><a href="or.html"><b><font face="Courier New" color="#003258" size="4">or</font></b></a></li>
  44   <li><a href="xor.html"><b><font face="Courier New" color="#003258" size="4">xor</font></b></a></li>
  45   <li><a href="true.html"><b><font face="Courier New" color="#003258" size="4">true</font></b></a></li>
  46   <li><a href="false.html"><b><font face="Courier New" color="#003258" size="4">false</font></b></a></li>
  47   <li><a href="ischosen.html"><b><font face="Courier New" color="#003258" size="4">ischosen</font></b></a></li>
  48   <li><a href="ispresent.html"><b><font face="Courier New" color="#003258" size="4">ispresent</font></b></a></li>
  49 </ul>
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  54   <tr>
  55     <td width="100%">
  56     <h3 align="center"><font face="Courier New" color="#003258" size="5"><b>boolean</b></font></h3>
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  63 <p>Example 1:
  64 <p><font face="Courier New">const boolean c_I_can_read_this := true;<br>
  65 </font>
  66 <p>The constant defined is called c_I_can_read_this and has the value true.</p>
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  69 <p><a HREF="BNF.html#booleankeyword">BNF definition</a> of <font face="Courier New">boolean</font> <br>
  70 <a HREF="BNF.html#booleanvalue">BNF definition</a> of boolean value</p>
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