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50 lines
1.4 KiB
Text
50 lines
1.4 KiB
Text
#REDIRECT [[OPEN#File_Access_Modes]]
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The [[OUTPUT]] file mode is used in an [[OPEN]] statement to send new data to files or ports.
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{{PageSyntax}}
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: [[OPEN]] {{Parameter|fileName$}} '''FOR''' [[OUTPUT]] '''AS''' #1
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{{PageDescription}}
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* OUTPUT mode erases all previous data in an existing file or clears a port receive buffer.
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* Creates an empty file if the filename does not exist. Use [[APPEND]] if previous file data is to be preserved.
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* Mode can use [[PRINT (file statement)|PRINT]], [[WRITE (file statement)|WRITE]] or [[PRINT USING (file statement)|PRINT USING]] to output file data.
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{{PageExamples}}
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''Example:'' Writes new data to a text file sequentially and reads it back to the program screen.
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{{CodeStart}} '' ''
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filename$ = "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|END}} '' ''
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{{CodeEnd}}
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{{PageSeeAlso}}
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* [[APPEND]], [[RANDOM]]
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* [[INPUT (file mode)]], [[BINARY]]
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* [[WRITE]], [[INPUT (file statement)]]
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{{PageNavigation}}
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