helpcontent2/source/text/sbasic/shared/03090301.xhp

   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 2008 by Sun Microsystems, Inc.
   9  *
  10  * OpenOffice.org - a multi-platform office productivity suite
  11  *
  12  * $RCSfile: 03090301.xhp,v $
  13  * $Revision: 1.5 $
  14  *
  15  * This file is part of OpenOffice.org.
  16  *
  17  * OpenOffice.org is free software: you can redistribute it and/or modify
  18  * it under the terms of the GNU Lesser General Public License version 3
  19  * only, as published by the Free Software Foundation.
  20  *
  21  * OpenOffice.org is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU Lesser General Public License version 3 for more details
  25  * (a copy is included in the LICENSE file that accompanied this code).
  26  *
  27  * You should have received a copy of the GNU Lesser General Public License
  28  * version 3 along with OpenOffice.org.  If not, see
  29  * <http://www.openoffice.org/license.html>
  30  * for a copy of the LGPLv3 License.
  31  *
  32  ************************************************************************-->
  33
  34 <helpdocument version="1.0">
  35 <meta>
  36 <topic id="textsbasicshared03090301xml" indexer="include" status="PUBLISH">
  37 <title id="tit" xml-lang="en-US">GoSub...Return Statement [Runtime]</title>
  38 <filename>/text/sbasic/shared/03090301.xhp</filename>
  39 </topic>
  40 <history>
  41 <created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created>
  42 <lastedited date="2004-08-24T12:39:27">converted from old format - fpe</lastedited>
  43 </history>
  44 </meta>
  45 <body>
  46 <section id="gosubreturn">
  47 <bookmark xml-lang="en-US" branch="index" id="bm_id3147242"><bookmark_value>GoSub...Return statement</bookmark_value>
  48 </bookmark>
  49 <paragraph role="heading" id="hd_id3147242" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03090301.xhp" name="GoSub...Return Statement [Runtime]">GoSub...Return Statement [Runtime]</link></paragraph>
  50 <paragraph role="paragraph" id="par_id3145316" xml-lang="en-US" l10n="U" oldref="2">Calls a subroutine that is indicated by a label from a subroutine or a function. The statements following the label are executed until the next Return statement. Afterwards, the program continues with the statement that follows the <emph>GoSub </emph>statement.</paragraph>
  51 </section>
  52 <paragraph role="heading" id="hd_id3145609" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph>
  53 <paragraph role="paragraph" id="par_id3145069" xml-lang="en-US" l10n="U" oldref="4">see Parameters</paragraph>
  54 <paragraph role="heading" id="hd_id3147265" xml-lang="en-US" level="2" l10n="U" oldref="5">Parameters:</paragraph>
  55 <paragraph role="paragraph" id="par_id3148664" xml-lang="en-US" l10n="U" oldref="6">Sub/Function</paragraph>
  56 <paragraph role="paragraph" id="par_id3150400" xml-lang="en-US" l10n="U" oldref="7">statement block</paragraph>
  57 <paragraph role="paragraph" id="par_id3154140" xml-lang="en-US" l10n="U" oldref="8"> Label</paragraph>
  58 <paragraph role="paragraph" id="par_id3150869" xml-lang="en-US" l10n="U" oldref="9">statement block</paragraph>
  59 <paragraph role="paragraph" id="par_id3154909" xml-lang="en-US" l10n="U" oldref="10">GoSub Label</paragraph>
  60 <paragraph role="paragraph" id="par_id3153969" xml-lang="en-US" l10n="U" oldref="11">Exit Sub/Function</paragraph>
  61 <paragraph role="paragraph" id="par_id3154685" xml-lang="en-US" l10n="U" oldref="12">Label:</paragraph>
  62 <paragraph role="paragraph" id="par_id3145786" xml-lang="en-US" l10n="U" oldref="13">statement block</paragraph>
  63 <paragraph role="paragraph" id="par_id3159252" xml-lang="en-US" l10n="U" oldref="14">Return</paragraph>
  64 <paragraph role="paragraph" id="par_id3154321" xml-lang="en-US" l10n="U" oldref="15">End Sub/Function</paragraph>
  65 <paragraph role="paragraph" id="par_id3147318" xml-lang="en-US" l10n="U" oldref="16">The <emph>GoSub</emph> statement calls a local subroutine indicated by a label from within a subroutine or a function. The name of the label must end with a colon (":").</paragraph>
  66 <paragraph role="warning" id="par_id3153190" xml-lang="en-US" l10n="U" oldref="17">If the program encounters a Return statement not preceded by <emph>GoSub</emph>, $[officename] Basic returns an error message. Use <emph>Exit Sub</emph> or <emph>Exit Function</emph> to ensure that the program leaves a Sub or Function before reaching the next Return statement.</paragraph>
  67 <paragraph role="paragraph" id="par_id3145799" xml-lang="en-US" l10n="U" oldref="19">The following example demonstrates the use of <emph>GoSub</emph> and <emph>Return</emph>. By executing a program section twice, the program calculates the square root of two numbers that are entered by the user.</paragraph>
  68 <paragraph role="heading" id="hd_id3156284" xml-lang="en-US" level="2" l10n="U" oldref="20">Example:</paragraph>
  69 <paragraph role="paragraph" id="par_id3151073" xml-lang="en-US" l10n="U" oldref="21">Sub ExampleGoSub</paragraph>
  70 <paragraph role="paragraph" id="par_id3154097" xml-lang="en-US" l10n="U" oldref="22">dim iInputa as Single</paragraph>
  71 <paragraph role="paragraph" id="par_id3150715" xml-lang="en-US" l10n="U" oldref="23">dim iInputb as Single</paragraph>
  72 <paragraph role="paragraph" id="par_id3153416" xml-lang="en-US" l10n="U" oldref="24">dim iInputc as Single</paragraph>
  73 <paragraph role="paragraph" id="par_id3146970" xml-lang="en-US" l10n="U" oldref="25">iInputa = Int(InputBox$ "Enter the first number: ","NumberInput"))</paragraph>
  74 <paragraph role="paragraph" id="par_id3150329" xml-lang="en-US" l10n="U" oldref="26">iInputb = Int(InputBox$ "Enter the second number: ","NumberInput"))</paragraph>
  75 <paragraph role="paragraph" id="par_id3156277" xml-lang="en-US" l10n="U" oldref="27">iInputc=iInputa</paragraph>
  76 <paragraph role="paragraph" id="par_id3150321" xml-lang="en-US" l10n="U" oldref="28">GoSub SquareRoot</paragraph>
  77 <paragraph role="paragraph" id="par_id3154756" xml-lang="en-US" l10n="U" oldref="29">Print "The square root of";iInputa;" is";iInputc</paragraph>
  78 <paragraph role="paragraph" id="par_id3155764" xml-lang="en-US" l10n="U" oldref="30">iInputc=iInputb</paragraph>
  79 <paragraph role="paragraph" id="par_id3152960" xml-lang="en-US" l10n="U" oldref="31">GoSub SquareRoot</paragraph>
  80 <paragraph role="paragraph" id="par_id3147340" xml-lang="en-US" l10n="U" oldref="32">Print "The square root of";iInputb;" is";iInputc</paragraph>
  81 <paragraph role="paragraph" id="par_id3166450" xml-lang="en-US" l10n="U" oldref="33">Exit Sub</paragraph>
  82 <paragraph role="paragraph" id="par_id3155176" xml-lang="en-US" l10n="U" oldref="34">SquareRoot:</paragraph>
  83 <paragraph role="paragraph" id="par_id3149257" xml-lang="en-US" l10n="U" oldref="35">iInputc=sqr(iInputc)</paragraph>
  84 <paragraph role="paragraph" id="par_id3146316" xml-lang="en-US" l10n="U" oldref="36">Return</paragraph>
  85 <paragraph role="paragraph" id="par_id3154703" xml-lang="en-US" l10n="U" oldref="37">End Sub</paragraph>
  86 </body>
  87 </helpdocument>