Module 5 Quiz: Loops

Question 1: What does range(5) produce?

1, 2, 3, 4, 5
0, 1, 2, 3, 4, 5
0, 1, 2, 3, 4
1, 2, 3, 4

Correct! range(5) generates numbers starting from 0 up to (but not including) 5: 0, 1, 2, 3, 4.

Question 2: What is the output?

for i in range(3, 7):
    print(i, end=" ")

3 4 5 6 7
3 4 5 6
4 5 6 7
3 4 5

Correct! range(3, 7) starts at 3 and goes up to but not including 7: 3, 4, 5, 6.

Question 3: When should you use a while loop instead of a for loop?

When you do not know how many iterations are needed
When you are iterating over a list
When you need to count from 1 to 10
While loops should always be used instead of for loops

Correct! While loops are ideal when the number of iterations depends on a condition that may change unpredictably, like user input or data-dependent logic.

Question 4: What does break do?

Skips the current iteration
Pauses the loop temporarily
Restarts the loop from the beginning
Exits the loop immediately

Correct! break immediately terminates the innermost loop and continues with the code after the loop.

Question 5: What does continue do?

Exits the loop
Skips the rest of the current iteration and moves to the next
Repeats the current iteration
Does nothing

Correct! continue skips the remaining code in the current iteration and jumps back to the loop condition check.

Question 6: What will this code print?

for i in range(5):
    if i == 3:
        break
    print(i, end=" ")

0 1 2 3
0 1 2 3 4
0 1 2
0 1 2 4

Correct! When i is 3, break exits the loop before print executes. So only 0, 1, 2 are printed.

Question 7: What will this code print?

for i in range(5):
    if i == 3:
        continue
    print(i, end=" ")

0 1 2
0 1 2 3 4
3
0 1 2 4

Correct! When i is 3, continue skips the print but does NOT exit the loop. All numbers except 3 are printed.

Question 8: How many times will the inner loop body execute?

for i in range(3):
    for j in range(4):
        print("X")

12
7
4
3

Correct! The outer loop runs 3 times. For each outer iteration, the inner loop runs 4 times. Total: 3 × 4 = 12.

Question 9: What is the purpose of pass?

To exit a loop
To skip an iteration
To serve as a placeholder that does nothing
To pause execution

Correct! pass is a "do nothing" statement used as a placeholder where Python requires a statement syntactically.

Question 10: What will this while loop print?

x = 1
while x < 8:
    print(x, end=" ")
    x *= 2

1 2 4 8
1 2 4
2 4 8
1 2 4 6

Correct! x starts at 1. Each iteration: print x then double it. x=1 (print, x becomes 2), x=2 (print, x becomes 4), x=4 (print, x becomes 8), x=8 (8 is not < 8, loop ends).

Question 11: What does range(10, 0, -2) produce?

10, 8, 6, 4, 2
10, 8, 6, 4, 2, 0
0, 2, 4, 6, 8, 10
8, 6, 4, 2

Correct! range(10, 0, -2) starts at 10, counts down by 2, and stops before 0: 10, 8, 6, 4, 2.

Question 12: When does a loop's else clause execute?

When the loop condition is initially False
Every time the loop runs
When a break statement is reached
When the loop completes without hitting a break

Correct! A loop's else clause runs only when the loop finishes normally (not terminated by break).