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Extensible Markup Language  |  2003-08-01  |  5.4 KB  |  44 lines
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <html><head><title>Rnd Function [Runtime]</title><meta name="filename" content="text/sbasic/common/03080302"/><help:css-file-link xmlns:help="http://openoffice.org/2000/help"/><!--The CSS style header method for setting styles--><style type="text/css">
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  4.         p.P1{
  5.                 }
  6.         span.T1{
  7.                 font-weight:bold;}
  8.         </style></head><body>
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  11.   <help:paragraphinfo state="E" xmlns:help="http://openoffice.org/2000/help"/><help:to-be-embedded Eid="rnd" xmlns:help="http://openoffice.org/2000/help">
  12.   <p class="Head1"><help:paragraphinfo state="U" number="1"/><help:key-word value="Rnd; function" tag="kw66414_1"/><help:link Id="66414">Rnd Function [Runtime]</help:link></p>
  13.   <p class="Paragraph"><help:paragraphinfo state="U" number="2"/>Returns a random number between 0 and 1.</p>
  14.   <help:paragraphinfo state="E"/></help:to-be-embedded>
  15.   <p class="Head2"><help:paragraphinfo state="U" number="3" xmlns:help="http://openoffice.org/2000/help"/>Syntax:</p>
  16.   <p class="Paragraph"><help:paragraphinfo state="U" number="4" xmlns:help="http://openoffice.org/2000/help"/>Rnd [(Expression)]</p>
  17.   <p class="Head2"><help:paragraphinfo state="U" number="5" xmlns:help="http://openoffice.org/2000/help"/>Return value:</p>
  18.   <p class="Paragraph"><help:paragraphinfo state="U" number="6" xmlns:help="http://openoffice.org/2000/help"/>Double</p>
  19.   <p class="Head2"><help:paragraphinfo state="U" number="7" xmlns:help="http://openoffice.org/2000/help"/>Parameters:</p>
  20.   <p class="Paragraph"><help:paragraphinfo state="U" number="8" xmlns:help="http://openoffice.org/2000/help"/><span class="T1">Expression:</span> Any numeric expression that defines how to generate random numbers.</p>
  21.   <p class="Paragraph"><help:paragraphinfo state="U" number="9" xmlns:help="http://openoffice.org/2000/help"/><span class="T1">Less than zero:</span> Always returns the same random number.</p>
  22.   <p class="Paragraph"><help:paragraphinfo state="U" number="10" xmlns:help="http://openoffice.org/2000/help"/><span class="T1">Greater than zero:</span> Returns the next random number in the sequence.</p>
  23.   <p class="Paragraph"><help:paragraphinfo state="U" number="11" xmlns:help="http://openoffice.org/2000/help"/><span class="T1">Zero:</span> Returns the random number that was last generated.</p>
  24.   <p class="Paragraph"><help:paragraphinfo state="U" number="12" xmlns:help="http://openoffice.org/2000/help"/><span class="T1">Omitted:</span> Returns the next random number in the sequence.</p>
  25.   <p class="Paragraph"><help:paragraphinfo state="U" number="13" xmlns:help="http://openoffice.org/2000/help"/>If the same number is passed for each successive call to the Rnd function, the same random-number sequence is generated. This is because the Expression parameter is used as a starting point for the next number.</p>
  26.   <p class="Paragraph"><help:paragraphinfo state="U" number="14" xmlns:help="http://openoffice.org/2000/help"/>The <span class="T1">Rnd</span> function only returns values ranging from 0 to 1. To generate random integers in a given range, use the formula in the following example:</p>
  27.   <p class="Paragraph"><help:paragraphinfo state="S" xmlns:help="http://openoffice.org/2000/help"/><help:embedded Id="66475" Eid="errorcode" xmlns:help="http://openoffice.org/2000/help"/></p>
  28.   <p class="Paragraph"><help:paragraphinfo state="S" xmlns:help="http://openoffice.org/2000/help"/><help:embedded Id="66475" Eid="err5" xmlns:help="http://openoffice.org/2000/help"/></p>
  29.   <p class="Head2"><help:paragraphinfo state="U" number="15" xmlns:help="http://openoffice.org/2000/help"/>Example:</p>
  30.   <p class="PropText"><help:paragraphinfo state="U" number="16" xmlns:help="http://openoffice.org/2000/help"/>Sub ExampleRandomSelect</p>
  31.   <p class="PropText"><help:paragraphinfo state="U" number="17" xmlns:help="http://openoffice.org/2000/help"/>Dim iVar As Integer</p>
  32.   <p class="PropText"><help:paragraphinfo state="U" number="18" xmlns:help="http://openoffice.org/2000/help"/>iVar = Int((15 * Rnd) -2)</p>
  33.   <p class="PropText"><help:paragraphinfo state="U" number="19" xmlns:help="http://openoffice.org/2000/help"/>Select Case iVar</p>
  34.   <p class="PropText"><help:paragraphinfo state="U" number="20" xmlns:help="http://openoffice.org/2000/help"/>Case 1 To 5</p>
  35.   <p class="PropText"><help:paragraphinfo state="U" number="21" xmlns:help="http://openoffice.org/2000/help"/>Print "Number from 1 to 5"</p>
  36.   <p class="PropText"><help:paragraphinfo state="U" number="22" xmlns:help="http://openoffice.org/2000/help"/>Case 6, 7, 8</p>
  37.   <p class="PropText"><help:paragraphinfo state="U" number="23" xmlns:help="http://openoffice.org/2000/help"/>Print "Number from 6 to 8"</p>
  38.   <p class="PropText"><help:paragraphinfo state="U" number="24" xmlns:help="http://openoffice.org/2000/help"/>Case Is > 8 And iVar < 11</p>
  39.   <p class="PropText"><help:paragraphinfo state="U" number="25" xmlns:help="http://openoffice.org/2000/help"/>Print "Greater than 8"</p>
  40.   <p class="PropText"><help:paragraphinfo state="U" number="26" xmlns:help="http://openoffice.org/2000/help"/>Case Else</p>
  41.   <p class="PropText"><help:paragraphinfo state="U" number="27" xmlns:help="http://openoffice.org/2000/help"/>Print "Outside range 1 to 10"</p>
  42.   <p class="PropText"><help:paragraphinfo state="U" number="28" xmlns:help="http://openoffice.org/2000/help"/>End Select</p>
  43.   <p class="PropText"><help:paragraphinfo state="U" number="29" xmlns:help="http://openoffice.org/2000/help"/>end sub</p>
  44.  </body></html>