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<?xml version="1.0" encoding="UTF-8"?>
<helpdocument version="1.0">
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<meta>
<topic id="textsbasicshared03090201xml" indexer="include" status="PUBLISH">
<title id="tit" xml-lang="en-US">Do...Loop Statement</title>
<filename>/text/sbasic/shared/03090201.xhp</filename>
</topic>
</meta>
<body>
<section id="doloop">
<bookmark xml-lang="en-US" branch="index" id="bm_id3156116">
<bookmark_value>Do...Loop statement</bookmark_value>
<bookmark_value>While; Do loop</bookmark_value>
<bookmark_value>Until</bookmark_value>
<bookmark_value>loops</bookmark_value>
</bookmark>
<paragraph id="hd_id3156116" role="heading" level="1" xml-lang="en-US"><link href="text/sbasic/shared/03090201.xhp" name="Do...Loop Statement">Do...Loop Statement</link></paragraph>
<paragraph id="par_id3109850" role="paragraph" xml-lang="en-US">Repeats the statements between the Do and the Loop statement while the condition is True or until the condition becomes True.</paragraph>
</section>
<paragraph id="hd_id3149119" role="heading" level="2" xml-lang="en-US">Syntax</paragraph>
<paragraph id="par_id3155150" role="bascode" xml-lang="en-US">Do [{While | Until} condition = True]</paragraph>
<paragraph id="par_id3154422" role="paragraph" xml-lang="en-US">statement block</paragraph>
<paragraph id="par_id3150789" role="bascode" xml-lang="en-US">[Exit Do]</paragraph>
<paragraph id="par_id3155805" role="paragraph" xml-lang="en-US">statement block</paragraph>
<paragraph id="par_id3145090" role="bascode" xml-lang="en-US">Loop</paragraph>
<paragraph id="par_id3154749" role="paragraph" xml-lang="en-US">or</paragraph>
<paragraph id="par_id3150503" role="bascode" xml-lang="en-US">Do</paragraph>
<paragraph id="par_id3149762" role="paragraph" xml-lang="en-US">statement block</paragraph>
<paragraph id="par_id3150984" role="bascode" xml-lang="en-US">[Exit Do]</paragraph>
<paragraph id="par_id3143228" role="paragraph" xml-lang="en-US">statement block</paragraph>
<paragraph id="par_id3149235" role="bascode" xml-lang="en-US">Loop [{While | Until} condition = True]</paragraph>
<paragraph id="hd_id3156024" role="heading" level="2" xml-lang="en-US">Parameters/Elements</paragraph>
<paragraph id="par_id3156344" role="paragraph" xml-lang="en-US"> <emph>Condition:</emph> A comparison, numeric or string expression, that evaluates either True or False.</paragraph>
<paragraph id="par_id3149669" role="paragraph" xml-lang="en-US"> <emph>Statement block:</emph> Statements that you want to repeat while or until the condition is True.</paragraph>
<paragraph id="par_id3150791" role="paragraph" xml-lang="en-US">The <emph>Do...Loop</emph> statement executes a loop as long as, or until, a certain condition is True. The condition for exiting the loop must be entered following either the <emph>Do</emph> or the <emph>Loop</emph> statement. The following examples are valid combinations:</paragraph>
<paragraph id="hd_id3154366" role="heading" level="2" xml-lang="en-US">Syntax</paragraph>
<paragraph id="par_id3145171" role="bascode" xml-lang="en-US">Do While condition = True</paragraph>
<paragraph id="par_id3149203" role="paragraph" xml-lang="en-US">...statement block</paragraph>
<paragraph id="par_id3125864" role="bascode" xml-lang="en-US">Loop</paragraph>
<paragraph id="par_id3154124" role="paragraph" xml-lang="en-US">The statement block between the Do While and the Loop statements is repeated so long as the condition is true.</paragraph>
<paragraph id="par_id3153968" role="bascode" xml-lang="en-US">Do Until condition = True</paragraph>
<paragraph id="par_id3154909" role="paragraph" xml-lang="en-US">...statement block</paragraph>
<paragraph id="par_id3159151" role="bascode" xml-lang="en-US">Loop</paragraph>
<paragraph id="par_id3150440" role="paragraph" xml-lang="en-US">The statement block between the Do Until and the Loop statements is repeated if the condition so long as the condition is false.</paragraph>
<paragraph id="par_id3153952" role="bascode" xml-lang="en-US">Do</paragraph>
<paragraph id="par_id3147349" role="paragraph" xml-lang="en-US">...statement block</paragraph>
<paragraph id="par_id3159153" role="bascode" xml-lang="en-US">Loop While condition = True</paragraph>
<paragraph id="par_id3146985" role="paragraph" xml-lang="en-US">The statement block between the Do and the Loop statements repeats so long as the condition is true.</paragraph>
<paragraph id="par_id3150488" role="bascode" xml-lang="en-US">Do</paragraph>
<paragraph id="par_id3153189" role="paragraph" xml-lang="en-US">...statement block</paragraph>
<paragraph id="par_id3155411" role="bascode" xml-lang="en-US">Loop Until condition = True</paragraph>
<paragraph id="par_id3151117" role="paragraph" xml-lang="en-US">The statement block between the Do and the Loop statements repeats until the condition is true.</paragraph>
<paragraph id="par_id3149484" role="paragraph" xml-lang="en-US">Use the <emph>Exit Do</emph> statement to unconditionally end the loop. You can add this statement anywhere in a <emph>Do</emph>...<emph>Loop</emph> statement. You can also define an exit condition using the <emph>If...Then</emph> structure as follows:</paragraph>
<paragraph id="par_id3149262" role="bascode" xml-lang="en-US">Do...</paragraph>
<paragraph id="par_id3149298" role="paragraph" xml-lang="en-US">statements</paragraph>
<paragraph id="par_id3145646" role="bascode" xml-lang="en-US">If condition = True Then Exit Do</paragraph>
<paragraph id="par_id3154490" role="paragraph" xml-lang="en-US">statements</paragraph>
<paragraph id="par_id3153159" role="bascode" xml-lang="en-US">Loop...</paragraph>
<paragraph id="hd_id3147396" role="heading" level="2" xml-lang="en-US">Example</paragraph>
<bascode>
<paragraph id="par_idm1341080208" role="bascode" localize="false" xml-lang="en-US">Sub ExampleDoLoop</paragraph>
<paragraph id="par_idm1341078976" role="bascode" localize="false" xml-lang="en-US">Dim sFile As String</paragraph>
<paragraph id="par_idm1341077744" role="bascode" localize="false" xml-lang="en-US">Dim sPath As String</paragraph>
<paragraph id="par_idm1341076512" role="bascode" localize="false" xml-lang="en-US"> sPath = "c:\"</paragraph>
<paragraph id="par_idm1341075280" role="bascode" localize="false" xml-lang="en-US"> sFile = Dir$( sPath ,22)</paragraph>
<paragraph id="par_idm1341074032" role="bascode" localize="false" xml-lang="en-US"> If sFile <> "" Then</paragraph>
<paragraph id="par_idm1341072656" role="bascode" localize="false" xml-lang="en-US"> Do</paragraph>
<paragraph id="par_idm1341071456" role="bascode" localize="false" xml-lang="en-US"> MsgBox sFile</paragraph>
<paragraph id="par_idm1341070208" role="bascode" localize="false" xml-lang="en-US"> sFile = Dir$</paragraph>
<paragraph id="par_idm1341068960" role="bascode" localize="false" xml-lang="en-US"> Loop Until sFile = ""</paragraph>
<paragraph id="par_idm1341067712" role="bascode" localize="false" xml-lang="en-US"> End If</paragraph>
<paragraph id="par_idm1341066480" role="bascode" localize="false" xml-lang="en-US">End Sub</paragraph>
</bascode>
</body>
</helpdocument>
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