1*b1cdbd2cSJim Jagielski<?xml version="1.0" encoding="UTF-8"?> 2*b1cdbd2cSJim Jagielski 3*b1cdbd2cSJim Jagielski 4*b1cdbd2cSJim Jagielski<!--*********************************************************** 5*b1cdbd2cSJim Jagielski * 6*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 7*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 8*b1cdbd2cSJim Jagielski * distributed with this work for additional information 9*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 10*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 11*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 12*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 13*b1cdbd2cSJim Jagielski * 14*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 15*b1cdbd2cSJim Jagielski * 16*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 17*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 18*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 19*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 20*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 21*b1cdbd2cSJim Jagielski * under the License. 22*b1cdbd2cSJim Jagielski * 23*b1cdbd2cSJim Jagielski ***********************************************************--> 24*b1cdbd2cSJim Jagielski 25*b1cdbd2cSJim Jagielski 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielski<helpdocument version="1.0"> 28*b1cdbd2cSJim Jagielski<meta> 29*b1cdbd2cSJim Jagielski<topic id="textsbasicshared03090202xml" indexer="include" status="PUBLISH"> 30*b1cdbd2cSJim Jagielski<title id="tit" xml-lang="en-US">For...Next Statement [Runtime]</title> 31*b1cdbd2cSJim Jagielski<filename>/text/sbasic/shared/03090202.xhp</filename> 32*b1cdbd2cSJim Jagielski</topic> 33*b1cdbd2cSJim Jagielski<history> 34*b1cdbd2cSJim Jagielski<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created> 35*b1cdbd2cSJim Jagielski<lastedited date="2004-08-24T12:09:02">converted from old format - fpe</lastedited> 36*b1cdbd2cSJim Jagielski</history> 37*b1cdbd2cSJim Jagielski</meta> 38*b1cdbd2cSJim Jagielski<body> 39*b1cdbd2cSJim Jagielski<section id="fornext"> 40*b1cdbd2cSJim Jagielski<bookmark xml-lang="en-US" branch="index" id="bm_id3149205"><bookmark_value>For statement</bookmark_value> 41*b1cdbd2cSJim Jagielski<bookmark_value>To statement</bookmark_value> 42*b1cdbd2cSJim Jagielski<bookmark_value>Step statement</bookmark_value> 43*b1cdbd2cSJim Jagielski<bookmark_value>Next statement</bookmark_value> 44*b1cdbd2cSJim Jagielski</bookmark> 45*b1cdbd2cSJim Jagielski<paragraph role="heading" id="hd_id3149205" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03090202.xhp" name="For...Next Statement [Runtime]">For...Next Statement [Runtime]</link></paragraph> 46*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3143267" xml-lang="en-US" l10n="U" oldref="2">Repeats the statements between the For...Next block a specified number of times.</paragraph> 47*b1cdbd2cSJim Jagielski</section> 48*b1cdbd2cSJim Jagielski<paragraph role="heading" id="hd_id3156153" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph> 49*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3148473" xml-lang="en-US" l10n="U" oldref="4">For counter=start To end [Step step]</paragraph> 50*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3156024" xml-lang="en-US" l10n="U" oldref="5">statement block</paragraph> 51*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3146796" xml-lang="en-US" l10n="U" oldref="6">[Exit For]</paragraph> 52*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3159414" xml-lang="en-US" l10n="U" oldref="7">statement block</paragraph> 53*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3153897" xml-lang="en-US" l10n="U" oldref="8">Next [counter]</paragraph> 54*b1cdbd2cSJim Jagielski<paragraph role="heading" id="hd_id3150400" xml-lang="en-US" level="2" l10n="U" oldref="9">Variables:</paragraph> 55*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3150358" xml-lang="en-US" l10n="U" oldref="10"> 56*b1cdbd2cSJim Jagielski<emph>Counter:</emph> Loop counter initially assigned the value to the right of the equal sign (start). Only numeric variables are valid. The loop counter increases or decreases according to the variable Step until End is passed.</paragraph> 57*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3152455" xml-lang="en-US" l10n="U" oldref="11"> 58*b1cdbd2cSJim Jagielski<emph>Start:</emph> Numeric variable that defines the initial value at the beginning of the loop.</paragraph> 59*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3151043" xml-lang="en-US" l10n="U" oldref="12"> 60*b1cdbd2cSJim Jagielski<emph>End:</emph> Numeric variable that defines the final value at the end of the loop.</paragraph> 61*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3156281" xml-lang="en-US" l10n="U" oldref="13"> 62*b1cdbd2cSJim Jagielski<emph>Step:</emph> Sets the value by which to increase or decrease the loop counter. If Step is not specified, the loop counter is incremented by 1. In this case, End must be greater than Start. If you want to decrease Counter, End must be less than Start, and Step must be assigned a negative value.</paragraph> 63*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3154684" xml-lang="en-US" l10n="U" oldref="14">The <emph>For...Next</emph> loop repeats all of the statements in the loop for the number of times that is specified by the parameters.</paragraph> 64*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3147287" xml-lang="en-US" l10n="U" oldref="15">As the counter variable is decreased, $[officename] Basic checks if the end value has been reached. As soon as the counter passes the end value, the loop automatically ends.</paragraph> 65*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3159154" xml-lang="en-US" l10n="U" oldref="16">It is possible to nest <emph>For...Next</emph> statements. If you do not specify a variable following the <emph>Next</emph> statement, <emph>Next</emph> automatically refers to the most recent <emph>For</emph> statement.</paragraph> 66*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155306" xml-lang="en-US" l10n="U" oldref="17">If you specify an increment of 0, the statements between <emph>For</emph> and <emph>Next</emph> are repeated continuously.</paragraph> 67*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155854" xml-lang="en-US" l10n="U" oldref="18">When counting down the counter variable, $[officename] Basic checks for overflow or underflow. The loop ends when Counter exceeds End (positive Step value) or is less than End (negative Step value).</paragraph> 68*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3145273" xml-lang="en-US" l10n="U" oldref="19">Use the <emph>Exit For</emph> statement to exit the loop unconditionally. This statement must be within a <emph>For...Next</emph> loop. Use the <emph>If...Then</emph> statement to test the exit condition as follows:</paragraph> 69*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3153190" xml-lang="en-US" l10n="U" oldref="20">For...</paragraph> 70*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149482" xml-lang="en-US" l10n="U" oldref="21">statements</paragraph> 71*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3147124" xml-lang="en-US" l10n="U" oldref="22">If condition = True Then Exit For</paragraph> 72*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3153159" xml-lang="en-US" l10n="U" oldref="23">statements</paragraph> 73*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3154096" xml-lang="en-US" l10n="U" oldref="24">Next</paragraph> 74*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3156286" xml-lang="en-US" l10n="U" oldref="25">Note: In nested <emph>For...Next</emph> loops, if you exit a loop unconditionally with <emph>Exit For</emph>, only one loop is exited.</paragraph> 75*b1cdbd2cSJim Jagielski<paragraph role="heading" id="hd_id3148457" xml-lang="en-US" level="2" l10n="U" oldref="26">Example</paragraph> 76*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3151074" xml-lang="en-US" l10n="U" oldref="27">The following example uses two nested loops to sort a string array with 10 elements ( sEntry() ), that are first filled with various contents:</paragraph> 77*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155603" xml-lang="en-US" l10n="U" oldref="28">Sub ExampleSort</paragraph> 78*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3156275" xml-lang="en-US" l10n="U" oldref="29">Dim sEntry(9) As String</paragraph> 79*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155066" xml-lang="en-US" l10n="U" oldref="30">Dim iCount As Integer</paragraph> 80*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3150751" xml-lang="en-US" l10n="U" oldref="31">Dim iCount2 As Integer</paragraph> 81*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155446" xml-lang="en-US" l10n="U" oldref="32">Dim sTemp As String</paragraph> 82*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155767" xml-lang="en-US" l10n="U" oldref="42">sEntry(0) = "Jerry"</paragraph> 83*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3153711" xml-lang="en-US" l10n="U" oldref="33">sEntry(1) = "Patty"</paragraph> 84*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3148993" xml-lang="en-US" l10n="U" oldref="34">sEntry(2) = "Kurt"</paragraph> 85*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3156382" xml-lang="en-US" l10n="U" oldref="35">sEntry(3) = "Thomas"</paragraph> 86*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155174" xml-lang="en-US" l10n="U" oldref="36">sEntry(4) = "Michael"</paragraph> 87*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3166448" xml-lang="en-US" l10n="U" oldref="37">sEntry(5) = "David"</paragraph> 88*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149255" xml-lang="en-US" l10n="U" oldref="38">sEntry(6) = "Cathy"</paragraph> 89*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149565" xml-lang="en-US" l10n="U" oldref="39">sEntry(7) = "Susie"</paragraph> 90*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3145148" xml-lang="en-US" l10n="U" oldref="40">sEntry(8) = "Edward"</paragraph> 91*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3145229" xml-lang="en-US" l10n="U" oldref="41">sEntry(9) = "Christine"</paragraph> 92*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149107" xml-lang="en-US" l10n="U" oldref="44">For iCount = 0 To 9</paragraph> 93*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3148485" xml-lang="en-US" l10n="U" oldref="45">For iCount2 = iCount + 1 To 9</paragraph> 94*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155608" xml-lang="en-US" l10n="U" oldref="46">If sEntry(iCount) > sEntry(iCount2) Then</paragraph> 95*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3150938" xml-lang="en-US" l10n="U" oldref="47">sTemp = sEntry(iCount)</paragraph> 96*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3153790" xml-lang="en-US" l10n="U" oldref="48">sEntry(iCount) = sEntry(iCount2)</paragraph> 97*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149210" xml-lang="en-US" l10n="U" oldref="49">sEntry(iCount2) = sTemp</paragraph> 98*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3153781" xml-lang="en-US" l10n="U" oldref="50">End If</paragraph> 99*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3158446" xml-lang="en-US" l10n="U" oldref="51">Next iCount2</paragraph> 100*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3150783" xml-lang="en-US" l10n="U" oldref="52">Next iCount</paragraph> 101*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3151278" xml-lang="en-US" l10n="U" oldref="57">For iCount = 0 To 9</paragraph> 102*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3148462" xml-lang="en-US" l10n="U" oldref="58">Print sEntry(iCount)</paragraph> 103*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149528" xml-lang="en-US" l10n="U" oldref="59">Next iCount</paragraph> 104*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3152580" xml-lang="en-US" l10n="U" oldref="60">End Sub</paragraph> 105*b1cdbd2cSJim Jagielski</body> 106*b1cdbd2cSJim Jagielski</helpdocument> 107