1<?xml version="1.0" encoding="UTF-8"?> 2 3 4<!--*********************************************************************** 5 * 6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 7 * 8 * Copyright 2000, 2010 Oracle and/or its affiliates. 9 * 10 * OpenOffice.org - a multi-platform office productivity suite 11 * 12 * This file is part of OpenOffice.org. 13 * 14 * OpenOffice.org is free software: you can redistribute it and/or modify 15 * it under the terms of the GNU Lesser General Public License version 3 16 * only, as published by the Free Software Foundation. 17 * 18 * OpenOffice.org is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU Lesser General Public License version 3 for more details 22 * (a copy is included in the LICENSE file that accompanied this code). 23 * 24 * You should have received a copy of the GNU Lesser General Public License 25 * version 3 along with OpenOffice.org. If not, see 26 * <http://www.openoffice.org/license.html> 27 * for a copy of the LGPLv3 License. 28 * 29 ************************************************************************--> 30 31<helpdocument version="1.0"> 32<meta> 33<topic id="textsbasicshared03100700xml" indexer="include" status="PUBLISH"> 34<title id="tit" xml-lang="en-US">Const Statement [Runtime]</title> 35<filename>/text/sbasic/shared/03100700.xhp</filename> 36</topic> 37<history> 38<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created> 39<lastedited date="2004-08-24T10:34:44">converted from old format - fpe</lastedited> 40</history> 41</meta> 42<body> 43<section id="const"> 44<bookmark xml-lang="en-US" branch="index" id="bm_id3146958"><bookmark_value>Const statement</bookmark_value> 45</bookmark> 46<paragraph role="heading" id="hd_id3146958" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03100700.xhp" name="Const Statement [Runtime]">Const Statement [Runtime]</link></paragraph> 47<paragraph role="paragraph" id="par_id3154143" xml-lang="en-US" l10n="U" oldref="2">Defines a string as a constant.</paragraph> 48</section> 49<paragraph role="heading" id="hd_id3150670" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph> 50<paragraph role="paragraph" id="par_id3150984" xml-lang="en-US" l10n="U" oldref="4">Const Text = Expression</paragraph> 51<paragraph role="heading" id="hd_id3147530" xml-lang="en-US" level="2" l10n="U" oldref="5">Parameters:</paragraph> 52<paragraph role="paragraph" id="par_id3153897" xml-lang="en-US" l10n="U" oldref="6"> 53<emph>Text:</emph> Any constant name that follows the standard variable naming conventions.</paragraph> 54<paragraph role="paragraph" id="par_id3147264" xml-lang="en-US" l10n="U" oldref="7">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:</paragraph> 55<paragraph role="paragraph" id="par_id3150542" xml-lang="en-US" l10n="U" oldref="8">CONST ConstName=Expression</paragraph> 56<paragraph role="paragraph" id="par_id3150400" xml-lang="en-US" l10n="U" oldref="9">The type of expression is irrelevant. If a program is started, $[officename] Basic converts the program code internally so that each time a constant is used, the defined expression replaces it.</paragraph> 57<paragraph role="heading" id="hd_id3154366" xml-lang="en-US" level="2" l10n="U" oldref="10">Example:</paragraph> 58<paragraph role="paragraph" id="par_id3145420" xml-lang="en-US" l10n="U" oldref="11">Sub ExampleConst</paragraph> 59<paragraph role="paragraph" id="par_id3154217" xml-lang="en-US" l10n="U" oldref="12">Const iVar = 1964</paragraph> 60<paragraph role="paragraph" id="par_id3156281" xml-lang="en-US" l10n="U" oldref="13">Msgbox iVar</paragraph> 61<paragraph role="paragraph" id="par_id3153969" xml-lang="en-US" l10n="U" oldref="14">Const sVar = "Program", dVar As Double = 1.00</paragraph> 62<paragraph role="paragraph" id="par_id3149560" xml-lang="en-US" l10n="U" oldref="15">Msgbox sVar & " " & dVar</paragraph> 63<paragraph role="paragraph" id="par_id3153368" xml-lang="en-US" l10n="U" oldref="16">end sub</paragraph> 64</body> 65</helpdocument> 66