KwickClips Java · 38 sec · free
Why does 40 + 50 / 2 give 65?
Short answer. Division runs first, so it is 40 + 25.
How do you find a logical error?
Test with inputs whose answers you already know.
Remember
| Logical error: wrong output |
| Test with answers you know |
No error message, but the answer is wrong. Why? Division happens before addition. So avg is sixty five, not forty five. Brackets fix it. Logical errors give wrong output. Test with answers you know.
This clip is from the full lesson: Errors in Java Programs: Syntax, Run-time and Logical — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: ICSE Class 9 Computer Applications
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