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Extensible Markup Language  |  2003-08-01  |  3.4 KB  |  29 lines
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <html><head><title>Const Statement [Runtime]</title><meta name="filename" content="text/sbasic/common/03100700"/><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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  6.         span.T1{
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  11.   <help:paragraphinfo state="E" xmlns:help="http://openoffice.org/2000/help"/><help:to-be-embedded Eid="const" xmlns:help="http://openoffice.org/2000/help">
  12.   <p class="Head1"><help:paragraphinfo state="U" number="1"/><help:key-word value="Const; statement" tag="kw66600_1"/><help:link Id="66600">Const Statement [Runtime]</help:link></p>
  13.   <p class="Paragraph"><help:paragraphinfo state="U" number="2"/>Defines a string as a constant.</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"/>Const Text = Expression</p>
  17.   <p class="Head2"><help:paragraphinfo state="U" number="5" xmlns:help="http://openoffice.org/2000/help"/>Parameters:</p>
  18.   <p class="Paragraph"><help:paragraphinfo state="U" number="6" xmlns:help="http://openoffice.org/2000/help"/><span class="T1">Text:</span> Any constant name that follows the standard variable naming conventions.</p>
  19.   <p class="Paragraph"><help:paragraphinfo state="U" number="7" xmlns:help="http://openoffice.org/2000/help"/>A constant is a variable that helps to improve the readability of a program. Constants are not defined as a specific type of variable, but rather are used as placeholders in the code. You can only define a constant once and it cannot be modified. Use the following statement to define a constant:</p>
  20.   <p class="Paragraph"><help:paragraphinfo state="U" number="8" xmlns:help="http://openoffice.org/2000/help"/>CONST ConstName=Expression</p>
  21.   <p class="Paragraph"><help:paragraphinfo state="U" number="9" xmlns:help="http://openoffice.org/2000/help"/>The type of expression is irrelevant. If a program is started, <help:productname xmlns:help="http://openoffice.org/2000/help">%PRODUCTNAME</help:productname> Basic converts the program code internally so that each time a constant is used, <text:s text:c="" xmlns:text="http://openoffice.org/2000/text"/>the defined expression replaces it.</p>
  22.   <p class="Head2"><help:paragraphinfo state="U" number="10" xmlns:help="http://openoffice.org/2000/help"/>Example:</p>
  23.   <p class="PropText"><help:paragraphinfo state="U" number="11" xmlns:help="http://openoffice.org/2000/help"/>Sub ExampleConst</p>
  24.   <p class="PropText"><help:paragraphinfo state="U" number="12" xmlns:help="http://openoffice.org/2000/help"/>Const iVar = 1964</p>
  25.   <p class="PropText"><help:paragraphinfo state="U" number="13" xmlns:help="http://openoffice.org/2000/help"/>Msgbox iVar</p>
  26.   <p class="PropText"><help:paragraphinfo state="U" number="14" xmlns:help="http://openoffice.org/2000/help"/>Const sVar = "Program", dVar As Double = 1.00</p>
  27.   <p class="PropText"><help:paragraphinfo state="U" number="15" xmlns:help="http://openoffice.org/2000/help"/>Msgbox sVar & " " & dVar</p>
  28.   <p class="PropText"><help:paragraphinfo state="U" number="16" xmlns:help="http://openoffice.org/2000/help"/>end sub</p>
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