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WRITE # Statement Details
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The WRITE # statement writes data to a sequential file.
WRITE #filenumber%[,expressionlist]
Usage Notes
■ The WRITE # statement, unlike the PRINT # statement, inserts commas
between items and quote marks around strings as they are written to
the file. You do not have to put explicit delimiters in the list.
A new line is inserted once the last item in the list has been written
to the file.
■ If you attempt to write data to a sequential file restricted
by a LOCK statement, BASIC generates the error message, "Permission
denied" appears unless it is trapped by the program. All of BASIC's
usual error-handling routines can trap and examine this error.