Document page
Computer Science IGCSEPDF 121
142 pagesrevision 46930
PDF 121
Page image rendered from the stored file at 110 dpi; it sharpens as you zoom. Outlines are placed from each region’s stored position on the page (612 × 792 pt).
readable
Source of this text: embedded text layer. The better of the embedded text and OCR is kept.
8.3.1 Purpose of storing data in a file
Answer:
One
Closing a file:
Exam question:
Reading and writing:
Main points:
● Always open a file before reading or writing.
● Use the correct mode (READ or WRITE).
● Always close the file after finishing.
Modes:
● READ → Read data from file
● WRITE → Write data to file (overwrites existing data)
Examples:
1
1
1
1
CLOSEFILE "Names.txt"
mark for each point (max two)
READFILE "Names.txt", Data
WRITEFILE "Remarks.txt", Remark
OPENFILE <filename> FOR <mode>
OPENFILE "Names.txt" FOR READ
OPENFILE "Remarks.txt" FOR WRITE