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61 lines
2.4 KiB
Text
61 lines
2.4 KiB
Text
The [[WRITE (file statement)|WRITE #]] file statement writes a list of comma separated variable values to a sequential file or port.
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{{PageSyntax}}
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:{{KW|WRITE (file statement)|WRITE #}}{{Parameter|filenumber&}}[, {{Parameter|expressionList}}]
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{{PageDescription}}
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* {{Parameter|filenumber&}} is the number of the file or device {{KW|OPEN}}ed in the {{KW|OUTPUT}} or {{KW|APPEND}} modes. See: {{KW|FREEFILE}}.
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* {{Parameter|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]] #.
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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]]s cannot be used in or following the WRITE statement!
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''Example:'' Writes new data to a text file sequentially and reads it back to the program screen.
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{{CodeStart}} '' ''
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filename$ = "testfile.dat"
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x = 1: y = 2: z$ = "Three"
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{{Cl|OPEN}} filename$ {{Cl|FOR...NEXT|FOR}} {{Cl|OUTPUT}} {{Cl|AS}} #1 'opens and clears an existing file or creates new empty file
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{{Cl|WRITE (file statement)|WRITE}} #1, x, y, z$
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{{Cl|CLOSE}} #1
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{{Cl|PRINT}} "File created with data. Press a key!"
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K$ = {{Cl|INPUT$}}(1) 'press a key
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{{Cl|OPEN}} filename$ {{Cl|FOR (file statement)|FOR}} {{Cl|INPUT (file mode)|INPUT}} {{Cl|AS}} #2 'opens a file to read it
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{{Cl|INPUT (file statement)|INPUT}} #2, a, b, c$
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{{Cl|CLOSE}} #2
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{{Cl|PRINT}} a, b, c$
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{{Cl|WRITE}} a, b, c$
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{{Cl|END}} '' ''
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{{CodeEnd}}
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: ''File content:'' [[WRITE]] string values will include quotation marks, but they are not required to read the file.
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{{TextStart}}1,2,"Three" '' '' {{TextEnd}}
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: ''Screen output:'' [[PRINT]] string values will not display enclosing quotes. [[WRITE]] screen displays will.
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{{OutputStart}} 1 2 Three
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1,2,"Three"
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{{OutputEnd}}
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{{PageSeeAlso}}
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* [[PRINT (file statement)|PRINT #]]
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* [[INPUT (file statement)|INPUT #]]
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* [[LINE INPUT (file statement)|LINE INPUT #]]
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* [[SQL Client]] {{text|(library)}}
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{{PageNavigation}}
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