CLOSE Keyword

CLOSE integer-variable

Closes an open file handle and flushes any pending writes.

Remarks

The parameter **must be an integer *variable*** that holds a valid file handle

previously returned by OPENIN,

OPENOUT, or

OPENUP.

A numeric literal or expression is not accepted.

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Example

FH = OPENOUT("log.txt")
WRITE FH, "hello"
CLOSE FH

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Notes

• After CLOSE, the handle becomes invalid and must not be reused unless re-opened.
• Closing an already-closed or never-opened handle raises a runtime error (trap with ON ERROR if needed).
• All buffered data is written to storage before the handle is released.
• Reading from or writing to a handle is only valid while it is open (see EOF for end-of-file checks).

See also: OPENIN, OPENOUT, OPENUP, WRITE, READ$, EOF