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<?xml version="1.0" encoding="UTF-8"?>
<helpdocument version="1.0">
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<meta>
<topic id="textsbasicshared03102600xml" indexer="include">
<title id="tit" xml-lang="en-US">IsNull Function</title>
<filename>/text/sbasic/shared/03102600.xhp</filename>
</topic>
</meta>
<body>
<section id="isnull">
<bookmark xml-lang="en-US" branch="index" id="bm_id3155555">
<bookmark_value>IsNull function</bookmark_value>
<bookmark_value>Null value</bookmark_value>
</bookmark>
<paragraph id="hd_id3155555" role="heading" level="1" xml-lang="en-US"><link href="text/sbasic/shared/03102600.xhp" name="IsNull Function">IsNull Function</link></paragraph>
<paragraph id="par_id3146957" role="paragraph" xml-lang="en-US">Tests if a Variant contains the special Null value, indicating that the variable does not contain data.</paragraph>
</section>
<paragraph id="hd_id3150670" role="heading" level="2" xml-lang="en-US">Syntax:</paragraph>
<bascode>
<paragraph id="par_id3150984" role="bascode" xml-lang="en-US">IsNull (Var)</paragraph>
</bascode>
<paragraph id="hd_id3149514" role="heading" level="2" xml-lang="en-US">Return value:</paragraph>
<paragraph id="par_id3145609" localize="false" role="paragraph">Boolean</paragraph>
<paragraph id="hd_id3149669" role="heading" level="2" xml-lang="en-US">Parameters:</paragraph>
<paragraph id="par_id3159414" role="paragraph" xml-lang="en-US"> <emph>Var:</emph> Any variable that you want to test. This function returns True if the Variant contains the Null value, or False if the Variant does not contain the Null value.</paragraph>
<paragraph id="par_idN1062A" role="paragraph" xml-lang="en-US"> <emph>Null</emph> - This value is used for a variant data sub type without valid contents.</paragraph>
<embed href="text/sbasic/shared/00000003.xhp#errorcode"/>
<embed href="text/sbasic/shared/00000003.xhp#err5"/>
<paragraph id="hd_id3153381" role="heading" level="2" xml-lang="en-US">Example:</paragraph>
<bascode>
<paragraph id="par_idm1340980640" role="bascode" localize="false" xml-lang="en-US">Sub ExampleIsNull</paragraph>
<paragraph id="par_idm1340979408" role="bascode" localize="false" xml-lang="en-US">Dim vVar As Variant</paragraph>
<paragraph id="par_idm1340978176" role="bascode" localize="false" xml-lang="en-US"> MsgBox IsNull(vVar)</paragraph>
<paragraph id="par_idm1340976944" role="bascode" localize="false" xml-lang="en-US">End Sub</paragraph>
</bascode>
</body>
</helpdocument>
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