EOF - DualBrain/bsharp GitHub Wiki

To return -1 (true) when the end of a sequential or a communications file has been reached, or to return 0 if end of file (EOF) has not been found.

Syntax

v=EOF(file number)

Comments

If a GET is done past the end of the file, EOF returns -1. This may be used to find the size of a file using a binary search or other algorithm. With communications files, a -1 indicates that the buffer is empty.

Use EOF to test for end of file while inputting to avoid Input Past End errors.

Example

Start:
  OPEN "I", 1, "DATA"
  C=0

ReadValue:
  IF EOF(1) THEN Done
  INPUT #1, M(C)
  C = C + 1 : GOTO ReadValue

Done:
  END

The file named DATA is read into the M array until the end of the file is reached, then the program branches to Done.

See Also

• GET, OPEN, INPUT#, GOTO, END