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74 lines
2.1 KiB
Markdown
74 lines
2.1 KiB
Markdown
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The [WRITE (file statement)](WRITE-(file-statement)) file statement writes a list of comma separated variable values to a sequential file or port.
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## Syntax
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> WRITE #filenumber&[, expressionList]
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## Description
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* filenumber& is the number of the file or device OPENed in the OUTPUT or APPEND modes. See: FREEFILE.
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* expressionList is a comma-separated list of values to be written to the file or device.
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* WRITE can place any number and types of variable values needed in a file record separated by commas.
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* String values will have quotation marks although quotes are not required to read strings in CSV files with [INPUT (file statement)](INPUT-(file-statement)) #.
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* Data files using WRITE normally will have the same number of values listed on each file line.
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* Data containing commas must be in quotation marks. Number commas are illegal!
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* WRITE created files are normally read with INPUT #.
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* CSV files created can be read by Excel using a .CSV file name extension. Strings may or may not include quotation marks.
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* [Semicolon](Semicolon)s cannot be used in or following the WRITE statement!
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## Example(s)
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Writes new data to a text file sequentially and reads it back to the program screen.
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```vb
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filename$ = "testfile.dat"
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x = 1: y = 2: z$ = "Three"
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OPEN filename$ FOR OUTPUT AS #1 'opens and clears an existing file or creates new empty file
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WRITE #1, x, y, z$
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CLOSE #1
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PRINT "File created with data. Press a key!"
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K$ = INPUT$(1) 'press a key
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OPEN filename$ FOR INPUT AS #2 'opens a file to read it
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INPUT #2, a, b, c$
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CLOSE #2
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PRINT a, b, c$
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WRITE a, b, c$
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END
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```
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> *File content:* [WRITE](WRITE) string values will include quotation marks, but they are not required to read the file.
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```text
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1,2,"Three"
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```
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> *Screen output:* [PRINT](PRINT) string values will not display enclosing quotes. [WRITE](WRITE) screen displays will.
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```text
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1 2 Three
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1,2,"Three"
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```
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## See Also
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* [PRINT (file statement)](PRINT-(file-statement))
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* [INPUT (file statement)](INPUT-(file-statement))
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* [LINE INPUT (file statement)](LINE-INPUT-(file-statement))
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* [SQL Client](SQL-Client) (library)
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