OUTPUT

See OPEN.

The OUTPUT file mode is used in an OPEN statement to send new data to files or ports.

OPEN fileName$ FOR OUTPUT AS #1

• OUTPUT mode erases all previous data in an existing file or clears a port receive buffer.
• Creates an empty file if the filename does not exist. Use APPEND if previous file data is to be preserved.
• Mode can use PRINT (file statement), WRITE (file statement) or PRINT USING (file statement) to output file data.

Writes new data to a text file sequentially and reads it back to the program screen.

filename$ = "testfile.dat"
x = 1: y = 2: z$ = "Three"

OPEN filename$ FOR OUTPUT AS #1 'opens and clears an existing file or creates new empty file

WRITE #1, x, y, z$

CLOSE #1

PRINT "File created with data. Press a key!"

K$ = INPUT$(1) 'press a key

OPEN filename$ FOR INPUT AS #2 'opens a file to read it

INPUT #2, a, b, c$

CLOSE #2

PRINT a, b, c$

END

• APPEND, RANDOM
• INPUT (file mode), BINARY
• WRITE, INPUT (file statement)