1. Testing Programs with Loops CSIS 1595: Fundamentals of Programming and Problem Solving 1

2. Testing Programs with Loops Infinite number of possible cases – cannot test them all! Basic test cases: – Case where go through loop once Make sure code inside loop works, and can exit loop Wrong guess first time, correct guess second time – Case where go through loop multiple times Make sure executing code multiple times does not cause errors Wrong guess multiple times – Case where never enter loop (condition false first time) Make sure not executing loop code does not cause errors Correct guess first time

3. Example Bug only apparent in case loop never entered

4. “Off by one” Errors Execute one too many or one too few times Initial values set incorrectly

5. Scaffolding in Loops Print values each time through loop – Intermediate values – Counts…