Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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LOF returns the size of a file, the number of records in an ISAM table, or,
when used with OPEN COM, the number of bytes free in the output buffer.
 
LOF(filenumber%)
    ■ The argument filenumber% is the number used in the OPEN statement
      to open the table.
 
Important
    ■ LOF can be used only on disk files, ISAM tables, or COMn: devices.
      It cannot be used with the BASIC devices SCRN, KYBD, CONS,
      LPTn, or PIPE.