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32 lines
949 B
Plaintext
32 lines
949 B
Plaintext
The [[LOF]] function is used to find the length of an [[OPEN]] file in bytes.
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{{PageSyntax}}
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: ''totalBytes&'' = [[LOF]]([#]{{Parameter|fileNumber}})
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{{PageDescription}}
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* LOF returns the number of bytes in an [[OPEN]]ed designated {{Parameter|fileNumber}}. File is empty if it returns 0.
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* {{Parameter|fileNumber}} is the number of the opened file. '''#''' is not required.
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* Often used to determine the number of records in a [[RANDOM]] access file.
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* Can also be used to avoid reading an empty file, which would create an error.
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* LOF in '''QB64''' can return up to 9 GB (9,223,372,036 bytes) file sizes.
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{{PageExamples}}
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''Example:'' Finding the number of records in a RANDOM file using a [[TYPE]] variable.
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{{CodeStart}}
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OPEN file$ FOR RANDOM AS #1 LEN = {{Cl|LEN}}(Type_variable)
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NumRecords% = {{Cl|LOF}}(1) \ RecordLEN%
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{{CodeEnd}}
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{{PageSeeAlso}}
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* [[LEN]], [[EOF]], [[BINARY]], [[RANDOM]], [[TYPE]]
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{{PageNavigation}}
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