WRITE

Syntax

WRITE #<file number>, <list of expressions>

Versions: Disk

Purpose

To write data to a sequential file in a format that can be easily read back with INPUT #.

Remarks

WRITE # outputs data to a sequential file opened for output (mode "O") or append (mode "A"). Unlike PRINT #, WRITE # formats the data with: - Strings enclosed in quotation marks - Numeric values without leading/trailing spaces - Commas separating each value

This format makes it easy to read the data back using INPUT # statements, as the delimiters and quotes are automatically handled.

The file must be opened for sequential output before using WRITE #.

Example

10 OPEN "O", 1, "DATA.TXT"
20 WRITE #1, "John Doe", 25, "Engineer"
30 WRITE #1, "Jane Smith", 30, "Manager"
40 CLOSE #1

' File contents:
' "John Doe",25,"Engineer"
' "Jane Smith",30,"Manager"

100 OPEN "I", 1, "DATA.TXT"
110 INPUT #1, N$, A, J$
120 PRINT N$, A, J$
130 CLOSE #1

Notes

• Strings are always quoted, making them safe for reading with INPUT #
• Numeric values have no leading/trailing spaces
• Each WRITE # adds a newline at the end
• Use PRINT # for more control over output formatting
• The file number must refer to a file opened for output ("O") or append ("A")

See Also

• WRITE - Write data to terminal (terminal output)
• INPUT# - Read data from a sequential file
• PRINT# - Write formatted data to a file
• OPEN - Open a file for I/O
• CLOSE - Close an open file
• EOF - Test for end of file
• LOC - Get current file position
• LOF - Get length of file