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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
<?xml version="1.0" encoding="UTF-8"?>
<!--***********************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: 03080302.xhp,v $
*
* $Revision: 1.3 $
*
* last change: $Author: rt $ $Date: 2005-09-07 16:07:26 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************-->
<helpdocument version="1.0">
<meta>
<topic id="textsbasicshared03080302xml" indexer="include" status="PUBLISH">
<title id="tit" xml-lang="en-US">Rnd Function [Runtime]</title>
<filename>/text/sbasic/shared/03080302.xhp</filename>
</topic>
<history>
<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created>
<lastedited date="2004-08-24T14:16:16">converted from old format - fpe</lastedited>
</history>
</meta>
<body>
<section id="rnd">
<bookmark xml-lang="en-US" branch="index" id="bm_id3148685"><bookmark_value>Rnd function</bookmark_value>
</bookmark>
<paragraph role="heading" id="hd_id3148685" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03080302.xhp" name="Rnd Function [Runtime]">Rnd Function [Runtime]</link></paragraph>
<paragraph role="paragraph" id="par_id3149669" xml-lang="en-US" l10n="U" oldref="2">Returns a random number between 0 and 1.</paragraph>
</section>
<paragraph role="heading" id="hd_id3153897" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph>
<paragraph role="paragraph" id="par_id3150543" xml-lang="en-US" l10n="U" oldref="4">Rnd [(Expression)]</paragraph>
<paragraph role="heading" id="hd_id3149655" xml-lang="en-US" level="2" l10n="U" oldref="5">Return value:</paragraph>
<paragraph role="paragraph" id="par_id3154365" xml-lang="en-US" l10n="U" oldref="6">Double</paragraph>
<paragraph role="heading" id="hd_id3154909" xml-lang="en-US" level="2" l10n="U" oldref="7">Parameters:</paragraph>
<paragraph role="paragraph" id="par_id3125864" xml-lang="en-US" l10n="U" oldref="8">
<emph>Expression:</emph> Any numeric expression that defines how to generate random numbers.</paragraph>
<paragraph role="paragraph" id="par_id3156423" xml-lang="en-US" l10n="U" oldref="9">
<emph>Less than zero:</emph> Always returns the same random number.</paragraph>
<paragraph role="paragraph" id="par_id3149560" xml-lang="en-US" l10n="U" oldref="10">
<emph>Greater than zero:</emph> Returns the next random number in the sequence.</paragraph>
<paragraph role="paragraph" id="par_id3148648" xml-lang="en-US" l10n="U" oldref="11">
<emph>Zero:</emph> Returns the random number that was last generated.</paragraph>
<paragraph role="paragraph" id="par_id3155306" xml-lang="en-US" l10n="U" oldref="12">
<emph>Omitted:</emph> Returns the next random number in the sequence.</paragraph>
<paragraph role="paragraph" id="par_id3153091" xml-lang="en-US" l10n="U" oldref="13">If the same number is passed for each successive call to the Rnd function, the same random-number sequence is generated. This is because the Expression parameter is used as a starting point for the next number.</paragraph>
<paragraph role="paragraph" id="par_id3147318" xml-lang="en-US" l10n="U" oldref="14">The <emph>Rnd</emph> function only returns values ranging from 0 to 1. To generate random integers in a given range, use the formula in the following example:</paragraph>
<embed href="text/sbasic/shared/00000003.xhp#errorcode"/>
<embed href="text/sbasic/shared/00000003.xhp#err5"/>
<paragraph role="heading" id="hd_id3151118" xml-lang="en-US" level="2" l10n="U" oldref="15">Example:</paragraph>
<paragraph role="paragraph" id="par_id3145365" xml-lang="en-US" l10n="U" oldref="16">Sub ExampleRandomSelect</paragraph>
<paragraph role="paragraph" id="par_id3147426" xml-lang="en-US" l10n="U" oldref="17">Dim iVar As Integer</paragraph>
<paragraph role="paragraph" id="par_id3150011" xml-lang="en-US" l10n="U" oldref="18">iVar = Int((15 * Rnd) -2)</paragraph>
<paragraph role="paragraph" id="par_id3148575" xml-lang="en-US" l10n="U" oldref="19">Select Case iVar</paragraph>
<paragraph role="paragraph" id="par_id3154097" xml-lang="en-US" l10n="U" oldref="20">Case 1 To 5</paragraph>
<paragraph role="paragraph" id="par_id3147124" xml-lang="en-US" l10n="U" oldref="21">Print "Number from 1 to 5"</paragraph>
<paragraph role="paragraph" id="par_id3155418" xml-lang="en-US" l10n="U" oldref="22">Case 6, 7, 8</paragraph>
<paragraph role="paragraph" id="par_id3154943" xml-lang="en-US" l10n="U" oldref="23">Print "Number from 6 to 8"</paragraph>
<paragraph role="paragraph" id="par_id3145800" xml-lang="en-US" l10n="U" oldref="24">Case Is > 8 And iVar < 11</paragraph>
<paragraph role="paragraph" id="par_id3151074" xml-lang="en-US" l10n="U" oldref="25">Print "Greater than 8"</paragraph>
<paragraph role="paragraph" id="par_id3154016" xml-lang="en-US" l10n="U" oldref="26">Case Else</paragraph>
<paragraph role="paragraph" id="par_id3155602" xml-lang="en-US" l10n="U" oldref="27">Print "Outside range 1 to 10"</paragraph>
<paragraph role="paragraph" id="par_id3150328" xml-lang="en-US" l10n="U" oldref="28">End Select</paragraph>
<paragraph role="paragraph" id="par_id3154479" xml-lang="en-US" l10n="U" oldref="29">end sub</paragraph>
</body>
</helpdocument>
|
