KwickClips Java · 41 sec · free
Why is variable data lost?
Short answer. Memory is wiped when the program ends.
What keeps data for next time?
A file on disk.
Memory or file?
| Kept in | After closing |
|---|---|
| Variable | lost |
| File on disk | still there |
Remember
| Variables vanish at the end |
| Files keep data for next time |
You close your program, and the marks vanish. Why? Here is how. Variables live in memory, which is wiped when the program ends. A file on disk stays. Two points. Variables vanish at the end. Files keep data for next time.
This clip is from the full lesson: File Handling — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 9 Information Technology (402), ICSE Class 9 Computer Applications, ISC Class 11 Computer Science (868), ISC Class 11 Computer Science (868)
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