Class 6 Computer Science — Repeating with loops

Read a loop, work out how many times it runs, and follow the value it builds up to the end.

Name: ________________________

1.A program sets a total to 0. It repeats this 3 times: add 10 to the total. What is the total at the end?
2.A program sets a total to 100. It repeats this 5 times: take 20 away from the total. What is the total at the end?

3.Follow this code by hand. What is total at the end?

total = 0
for i in range(0, 4):
    total = total + 6

4.A program needs to print a star one hundred times. Why is a loop better than writing the printing step out one hundred times?
- a) It makes the stars appear in a different order
- b) Loops are the only way a computer can print anything
- c) It is far shorter, and changing the number changes it everywhere at once
- d) It uses one hundred times less memory to store a star
5.A program sets a total to 7. It repeats this 4 times: add 2 to the total. What is the total at the end?
6.A program repeats this 4 times: print 3 stars. How many stars are printed?
7.A program sets a total to 0. It repeats this 5 times: add 4 to the total. What is the total at the end?
8.A program sets a number to 2, then doubles it three times over. Put the values the number holds in order, from the start to the end.
- 4
- 16
- 8
- 2

Answer key — Class 6 Computer Science — Repeating with loops