KwickClips Course Topics · 42 sec · free
Do logic errors stop a program running?
Short answer. No. They run but give wrong results.
What tool finds logic errors by hand?
A trace table.
Remember
| Logic errors run, but wrongly |
| A trace table finds them |
This total is always wrong. Can you spot why? Five marks are input. Line four replaces Total each time. That is a logic error. Write Total gets Total plus M. Two points. Logic errors still run. A trace table finds them.
This clip is from the full lesson: Trace tables and identifying/correcting errors — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Cambridge IGCSE Grade 9 Computer Science (0478)
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