fl = FILE_LENGTH(#channel)
fl = FILE_LENGTH(‘filename’)
The file length is returned. The file may be open, in which case simply supply the channel number, or closed, supply the filename in quotes. If the returned value is negative, then it is a QDOS error code.
1000 fl = FILE_LENGTH('flp1_WinBack_exe') 1010 IF fl <= 0 THEN 1020 PRINT "Error checking FILE_LENGTH: " & fl 1030 ELSE 1040 PRINT "WinBack_exe's file size is " & fl & " bytes." 1050 END IF