summaryrefslogtreecommitdiffstats
path: root/helpcontent2/source/text/sbasic/shared/03080302.xhp
blob: 109723caf0f09d7ce94dc7314cf3b71b38bc0b48 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
<?xml version="1.0" encoding="UTF-8"?>
<helpdocument version="1.0">
<!--
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
-->

<meta>
  <topic id="textsbasicshared03080302xml" indexer="include" status="PUBLISH">
    <title id="tit" xml-lang="en-US">Rnd Function</title>
    <filename>/text/sbasic/shared/03080302.xhp</filename>
  </topic>
</meta>

<body>


<section id="rnd">
<bookmark xml-lang="en-US" branch="index" id="bm_id3148685">
  <bookmark_value>Rnd function</bookmark_value>
</bookmark>


<paragraph id="hd_id3148685" role="heading" level="1" xml-lang="en-US"><variable id="heading_rnd"><link href="text/sbasic/shared/03080302.xhp" name="Rnd Function">Rnd Function</link></variable></paragraph>
<paragraph id="par_id3149669" role="paragraph" xml-lang="en-US">Returns a random number between 0 and 1.</paragraph>
</section>

<paragraph id="hd_id3153897" role="heading" level="2" xml-lang="en-US">Syntax:</paragraph>
<bascode>
<paragraph id="par_id3150543" role="bascode" xml-lang="en-US">Rnd [(Expression)]</paragraph>
</bascode>
<paragraph id="hd_id3149655" role="heading" level="2" xml-lang="en-US">Return value:</paragraph>
<paragraph id="par_id3154365" localize="false" role="paragraph">Double</paragraph>

<paragraph id="hd_id3154909" role="heading" level="2" xml-lang="en-US">Parameters:</paragraph>
<paragraph id="par_id3125864" role="paragraph" xml-lang="en-US"> <emph>Expression:</emph> Has no effect, is ignored if provided.</paragraph>
<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>
<embed href="text/sbasic/shared/00000003.xhp#errorcode"/>
<embed href="text/sbasic/shared/00000003.xhp#err5"/>

<paragraph id="hd_id3151118" role="heading" level="2" xml-lang="en-US">Example:</paragraph>
<bascode>
<paragraph id="par_idm1341382704" role="bascode" localize="false" xml-lang="en-US">Sub ExampleRandomSelect</paragraph>
<paragraph id="par_idm1341381472" role="bascode" localize="false" xml-lang="en-US">Dim iVar As Integer</paragraph>
<paragraph id="par_idm1341380240" role="bascode" localize="false" xml-lang="en-US">    iVar = Int((15 * Rnd) -2)</paragraph>
<paragraph id="par_idm1341378992" role="bascode" localize="false" xml-lang="en-US">    Select Case iVar</paragraph>
<paragraph id="par_idm1341377760" role="bascode" localize="false" xml-lang="en-US">        Case 1 To 5</paragraph>
<paragraph id="par_id3147124" role="bascode" xml-lang="en-US">            Print "Number from 1 to 5"</paragraph>
<paragraph id="par_idm1341374800" role="bascode" localize="false" xml-lang="en-US">        Case 6, 7, 8</paragraph>
<paragraph id="par_id3154943" role="bascode" xml-lang="en-US">            Print "Number from 6 to 8"</paragraph>
<paragraph id="par_idm1341371792" role="bascode" localize="false" xml-lang="en-US">        Case Is &gt; 8 And iVar &lt; 11</paragraph>
<paragraph id="par_id3151074" role="bascode" xml-lang="en-US">            Print "Greater than 8"</paragraph>
<paragraph id="par_idm1341368768" role="bascode" localize="false" xml-lang="en-US">        Case Else</paragraph>
<paragraph id="par_id3155602" role="bascode" xml-lang="en-US">            Print "Outside range 1 to 10"</paragraph>
<paragraph id="par_idm1341365792" role="bascode" localize="false" xml-lang="en-US">    End Select</paragraph>
<paragraph id="par_idm1341364560" role="bascode" localize="false" xml-lang="en-US">End Sub</paragraph>
</bascode>
<section id="relatedtopics">
<paragraph id="par_id110520162210036951" role="paragraph" localize="false" xml-lang="en-US"><embedvar href="text/sbasic/shared/03080301.xhp#heading_randomize"/></paragraph>
</section>
</body>

</helpdocument>