1<?xml version="1.0" encoding="UTF-8"?> 2 3 4<!--*********************************************************** 5 * 6 * Licensed to the Apache Software Foundation (ASF) under one 7 * or more contributor license agreements. See the NOTICE file 8 * distributed with this work for additional information 9 * regarding copyright ownership. The ASF licenses this file 10 * to you under the Apache License, Version 2.0 (the 11 * "License"); you may not use this file except in compliance 12 * with the License. You may obtain a copy of the License at 13 * 14 * http://www.apache.org/licenses/LICENSE-2.0 15 * 16 * Unless required by applicable law or agreed to in writing, 17 * software distributed under the License is distributed on an 18 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 19 * KIND, either express or implied. See the License for the 20 * specific language governing permissions and limitations 21 * under the License. 22 * 23 ***********************************************************--> 24 25 26 27<helpdocument version="1.0"> 28<meta> 29<topic id="textsbasicshared03100700xml" indexer="include" status="PUBLISH"> 30<title id="tit" xml-lang="en-US">Const Statement [Runtime]</title> 31<filename>/text/sbasic/shared/03100700.xhp</filename> 32</topic> 33<history> 34<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created> 35<lastedited date="2004-08-24T10:34:44">converted from old format - fpe</lastedited> 36</history> 37</meta> 38<body> 39<section id="const"> 40<bookmark xml-lang="en-US" branch="index" id="bm_id3146958"><bookmark_value>Const statement</bookmark_value> 41</bookmark> 42<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> 43<paragraph role="paragraph" id="par_id3154143" xml-lang="en-US" l10n="U" oldref="2">Defines a string as a constant.</paragraph> 44</section> 45<paragraph role="heading" id="hd_id3150670" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph> 46<paragraph role="paragraph" id="par_id3150984" xml-lang="en-US" l10n="U" oldref="4">Const Text = Expression</paragraph> 47<paragraph role="heading" id="hd_id3147530" xml-lang="en-US" level="2" l10n="U" oldref="5">Parameters:</paragraph> 48<paragraph role="paragraph" id="par_id3153897" xml-lang="en-US" l10n="U" oldref="6"> 49<emph>Text:</emph> Any constant name that follows the standard variable naming conventions.</paragraph> 50<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> 51<paragraph role="paragraph" id="par_id3150542" xml-lang="en-US" l10n="U" oldref="8">CONST ConstName=Expression</paragraph> 52<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> 53<paragraph role="heading" id="hd_id3154366" xml-lang="en-US" level="2" l10n="U" oldref="10">Example:</paragraph> 54<paragraph role="paragraph" id="par_id3145420" xml-lang="en-US" l10n="U" oldref="11">Sub ExampleConst</paragraph> 55<paragraph role="paragraph" id="par_id3154217" xml-lang="en-US" l10n="U" oldref="12">Const iVar = 1964</paragraph> 56<paragraph role="paragraph" id="par_id3156281" xml-lang="en-US" l10n="U" oldref="13">Msgbox iVar</paragraph> 57<paragraph role="paragraph" id="par_id3153969" xml-lang="en-US" l10n="U" oldref="14">Const sVar = "Program", dVar As Double = 1.00</paragraph> 58<paragraph role="paragraph" id="par_id3149560" xml-lang="en-US" l10n="U" oldref="15">Msgbox sVar & " " & dVar</paragraph> 59<paragraph role="paragraph" id="par_id3153368" xml-lang="en-US" l10n="U" oldref="16">end sub</paragraph> 60</body> 61</helpdocument> 62