76 lines
4.4 KiB
XML
76 lines
4.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<helpdocument version="1.0">
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<!--
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* This file is part of the LibreOffice project.
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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-->
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<meta>
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<topic id="textsbasicshared03080302xml" indexer="include" status="PUBLISH">
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<title id="tit" xml-lang="en-US">Rnd Function</title>
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<filename>/text/sbasic/shared/03080302.xhp</filename>
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</topic>
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</meta>
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<body>
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<section id="rnd">
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<bookmark xml-lang="en-US" branch="index" id="bm_id3148685">
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<bookmark_value>Rnd function</bookmark_value>
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</bookmark>
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<h1 id="hd_id3148685"><variable id="heading_rnd"><link href="text/sbasic/shared/03080302.xhp">Rnd Function</link></variable></h1>
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<paragraph id="par_id3149669" role="paragraph" xml-lang="en-US">Returns a random number between 0 and 1.</paragraph>
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</section>
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<h2 id="hd_id3153897">Syntax:</h2>
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<bascode>
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<paragraph id="par_id3150543" role="bascode" xml-lang="en-US">Rnd [(Expression)]</paragraph>
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</bascode>
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<h2 id="hd_id3149655">Return value:</h2>
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<paragraph id="par_id3154365" localize="false" role="paragraph">Double</paragraph>
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<h2 id="hd_id3154909">Parameters:</h2>
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<paragraph id="par_id3125864" role="paragraph" xml-lang="en-US"> <emph>Expression:</emph> Has no effect, is ignored if provided.</paragraph>
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<paragraph id="par_id3147318" role="paragraph" xml-lang="en-US">The <emph>Rnd</emph> function returns decimal fractions ranging from 0 (included) to 1 (excluded) according to a uniform distribution. It uses the Mersenne Twister 19937 random-number generator. To generate random integers in a given range, use a formula like in the example below. A <emph>Randomize</emph> statement with a defined seed value can be used beforehand, if a predictable sequence of numbers is desired.</paragraph>
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<embed href="text/sbasic/shared/00000003.xhp#errorcode"/>
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<embed href="text/sbasic/shared/00000003.xhp#err5"/>
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<h2 id="hd_id3151118">Example:</h2>
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<bascode>
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<paragraph id="par_idm1341382704" role="bascode" localize="false" xml-lang="en-US">Sub ExampleRandomSelect</paragraph>
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<paragraph id="par_idm1341381472" role="bascode" localize="false" xml-lang="en-US">Dim iVar As Integer</paragraph>
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<paragraph id="par_idm1341380240" role="bascode" localize="false" xml-lang="en-US"> iVar = Int((15 * Rnd) -2)</paragraph>
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<paragraph id="par_idm1341378992" role="bascode" localize="false" xml-lang="en-US"> Select Case iVar</paragraph>
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<paragraph id="par_idm1341377760" role="bascode" localize="false" xml-lang="en-US"> Case 1 To 5</paragraph>
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<paragraph id="par_id3147124" role="bascode" xml-lang="en-US"> Print "Number from 1 to 5"</paragraph>
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<paragraph id="par_idm1341374800" role="bascode" localize="false" xml-lang="en-US"> Case 6, 7, 8</paragraph>
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<paragraph id="par_id3154943" role="bascode" xml-lang="en-US"> Print "Number from 6 to 8"</paragraph>
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<paragraph id="par_idm1341371792" role="bascode" localize="false" xml-lang="en-US"> Case Is > 8 And iVar < 11</paragraph>
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<paragraph id="par_id3151074" role="bascode" xml-lang="en-US"> Print "Greater than 8"</paragraph>
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<paragraph id="par_idm1341368768" role="bascode" localize="false" xml-lang="en-US"> Case Else</paragraph>
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<paragraph id="par_id3155602" role="bascode" xml-lang="en-US"> Print "Outside range 1 to 10"</paragraph>
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<paragraph id="par_idm1341365792" role="bascode" localize="false" xml-lang="en-US"> End Select</paragraph>
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<paragraph id="par_idm1341364560" role="bascode" localize="false" xml-lang="en-US">End Sub</paragraph>
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</bascode>
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<section id="relatedtopics">
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<paragraph id="par_id110520162210036951" role="paragraph" localize="false" xml-lang="en-US"><embedvar href="text/sbasic/shared/03080301.xhp#heading_randomize"/></paragraph>
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</section>
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</body>
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</helpdocument>
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