Text files · ⁨ไฟล์ข้อความ (Text files)⁩

A file keeps data after the program stops

• The 2026–2028 syllabus (section 8.3) stores data in a text file.
• You open the file, read or write one item, then close it.
• This course keeps the file in memory for the one run, so you can see the result.

DECLARE LineOfText : STRING
OPENFILE "Note.txt" FOR WRITE
WRITEFILE "Note.txt", "Hello"
CLOSEFILE "Note.txt"
OPENFILE "Note.txt" FOR READ
READFILE "Note.txt", LineOfText
CLOSEFILE "Note.txt"
OUTPUT LineOfText

DECLARE LineOfText : STRING
OPENFILE "FileA.txt" FOR WRITE
WRITEFILE "FileA.txt", "Saved"
CLOSEFILE "FileA.txt"
OPENFILE "FileA.txt" FOR READ
READFILE "FileA.txt", LineOfText
CLOSEFILE "FileA.txt"
OPENFILE "FileB.txt" FOR WRITE
WRITEFILE "FileB.txt", LineOfText
CLOSEFILE "FileB.txt"
OUTPUT LineOfText

DECLARE LineOfText : STRING
OPENFILE "List.txt" FOR WRITE
WRITEFILE "List.txt", "Red"
WRITEFILE "List.txt", "Blue"
CLOSEFILE "List.txt"
OPENFILE "List.txt" FOR READ
WHILE NOT EOF("List.txt") DO
    READFILE "List.txt", LineOfText
    OUTPUT LineOfText
ENDWHILE
CLOSEFILE "List.txt"