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<h1 id="hd_id3156024" dir="auto">Lof Function</h1>
<p id="par_id3146794" class="paragraph" dir="auto">Returns the size of an open file in bytes.</p>
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<h3 id="hd_id061420171139089682" dir="auto">Syntax:</h3>
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<div class="bascode" itemscope="true" itemtype="http://schema.org/SoftwareSourceCode" itemprop="codeSampleType" content="snippet" data-tooltip="Click on text to copy to clipboard"><pre dir="auto"><code class="language-visual-basic line-numbers">
Lof (FileNumber) As Long
</code></pre></div>
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<h3 id="hd_id061420171139087480" dir="auto">Return value:</h3>
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<p id="par_id3147230" class="paragraph" dir="auto">Long</p>
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<h3 id="hd_id061420171139084157" dir="auto">Parameters:</h3>
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<p id="par_id3150869" class="paragraph" dir="auto">
<span class="emph">FileNumber:</span> Any numeric expression that contains the file number that is specified in the <span class="literal">Open</span> statement.</p>
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<div class="notetext"><p dir="auto">To obtain the length of a file that is not open, use the <a target="_top" href="en-US/text/sbasic/shared/03020408.html"><span class="literal">FileLen</span></a> function.</p></div>
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<br>
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<h3 id="hd_id3152869" dir="auto">Error codes:</h3>
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<div class="embedded"><p class="embedded" dir="auto">5 Invalid procedure call</p></div>
<div class="embedded"><p class="embedded" dir="auto">52 Invalid file name or file number</p></div>
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<h3 id="hd_id061420171139088233" dir="auto">Example:</h3>
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<span hidden="true" id="WINtextsbasicshared03020201xml_1" class="WIN">
<div class="bascode" itemscope="true" itemtype="http://schema.org/SoftwareSourceCode" itemprop="codeSampleType" content="snippet" data-tooltip="Click on text to copy to clipboard"><pre dir="auto"><code class="language-visual-basic line-numbers">
Sub ExampleRandomAccess
Dim iNumber As Integer
Dim sText As Variant ' Must be a variant
Dim aFile As String
aFile = "C:\Users\ThisUser\data.txt"
iNumber = Freefile
Open aFile For Random As #iNumber Len=32
Seek #iNumber,1 ' Position at beginning
Put #iNumber, , "This is the first line of text" ' Fill line with text
Put #iNumber, , "This is the second line of text"
Put #iNumber, , "This is the third line of text"
Seek #iNumber,2
Get #iNumber, , sText
Print sText
Close #iNumber
iNumber = Freefile
Open aFile For Random As #iNumber Len=32
Get #iNumber, 2, sText
Put #iNumber, , "This is a new text"
Get #iNumber, 1, sText
Get #iNumber, 2, sText
Put #iNumber, 20, "This is the text in record 20"
Print Lof(#iNumber)
Close #iNumber
End Sub
</code></pre></div>
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<div class="bascode" itemscope="true" itemtype="http://schema.org/SoftwareSourceCode" itemprop="codeSampleType" content="snippet" data-tooltip="Click on text to copy to clipboard"><pre dir="auto"><code class="language-visual-basic line-numbers">
Sub ExampleRandomAccess
Dim iNumber As Integer
Dim sText As Variant ' Must be a variant
Dim aFile As String
aFile = "~/data.txt"
iNumber = Freefile
Open aFile For Random As #iNumber Len=32
Seek #iNumber,1 ' Position at beginning
Put #iNumber, , "This is the first line of text" ' Fill line with text
Put #iNumber, , "This is the second line of text"
Put #iNumber, , "This is the third line of text"
Seek #iNumber,2
Get #iNumber, , sText
Print sText
Close #iNumber
iNumber = Freefile
Open aFile For Random As #iNumber Len=32
Get #iNumber, 2, sText
Put #iNumber, , "This is a new text"
Get #iNumber, 1, sText
Get #iNumber, 2, sText
Put #iNumber, 20, "This is the text in record 20"
Print Lof(#iNumber)
Close #iNumber
End Sub
</code></pre></div>
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<div class="embedded"><p class="embedded" dir="auto"><a target="_top" href="en-US/text/sbasic/shared/03020101.html">Close Statement</a></p></div>
<div class="embedded"><p class="embedded" dir="auto"><a target="_top" href="en-US/text/sbasic/shared/03010103.html">Print# Statement</a></p></div>
<div class="embedded"><p class="embedded" dir="auto"><a target="_top" href="en-US/text/sbasic/shared/03020103.html">Open Statement</a></p></div>
<div class="embedded"><p class="embedded" dir="auto"><a target="_top" href="en-US/text/sbasic/shared/03020201.html">Get Statement</a></p></div>
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