LOF

The LOF function is used to find the length of an OPEN file in bytes.

Syntax

totalBytes& = LOF([#]fileNumber)

Description

• LOF returns the number of bytes in an OPENed designated fileNumber. File is empty if it returns 0.
• fileNumber is the number of the opened file. # is not required.
• Often used to determine the number of records in a RANDOM access file.
• Can also be used to avoid reading an empty file, which would create an error.
• LOF in QB64 can return up to 9 GB (9,223,372,036 bytes) file sizes.

Examples

Example: Finding the number of records in a RANDOM file using a TYPE variable.

OPEN file$ FOR RANDOM AS #1 LEN = LEN(Type_variable) NumRecords% = LOF(1) \ RecordLEN%

See also

• LEN, EOF, BINARY, RANDOM, TYPE

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