Lesson 10 Quiz: Loops: Repeating Without Retyping

1. What problem does a loop solve?

A. It makes the computer run faster. B. Repeating an action without retyping it — write once, run many times. C. It fixes errors in your code automatically. D. It saves your program to a file.

2. What numbers does `range(5)` produce, and why does it start at 0?

A. 1, 2, 3, 4, 5 — `range()` counts from 1 by default. B. 0, 1, 2, 3, 4, 5 — `range()` counts from 0 and includes the number you give it. C. 0, 1, 2, 3, 4 — `range()` counts from 0 by default. D. 5, 4, 3, 2, 1 — `range()` counts down from the number you give it.

3. What does `range(1, 6)` produce, and why does it stop at 5?

A. 1, 2, 3, 4, 5, 6 — the stop value is the last number produced. B. 0, 1, 2, 3, 4, 5 — `range()` always starts at 0. C. 1, 2, 3, 4 — the stop value is two past the last number produced. D. 1, 2, 3, 4, 5 — the stop value is one past the last number produced.

4. How does a `while` loop decide when to stop?

A. It repeats while its condition is true and stops the moment it becomes false. B. It repeats a fixed number of times, then stops. C. It stops when it has printed something. D. It never stops — a `while` loop always runs forever.

5. What causes an infinite loop, and how do you stop one in IDLE?

A. A loop with no print statement — stop it by pressing F5. B. A missing colon — stop it by restarting the computer. C. A condition that never becomes false, because the loop never updates the tested value — stop it with Shell → Restart Shell. D. A loop that counts too high — stop it by waiting for it to finish.