Year 9 Computing — Loops that count

1.Follow this code by hand. How many numbers does it print altogether?

for n in range(2, 7):
    print(n)
    print(n * 10)

2.This loop takes away rather than adds. What is total at the end?

total = 100
for n in range(1, 4):
    total = total - n

3.Follow this code by hand. How many numbers does it print?

for n in range(3, 9):
    print(n)

4.Look hard at the two numbers in the range. How many times does the indented line run?

for step in range(5, 5):
    print(step)

• a) 0
• b) 10
• c) 5
• d) 1

5.The counter starts a long way above zero here. How many times does the indented line run?

for n in range(10, 20):
    print(n * 2)

6.Each of these loops prints its counter every time round. Match each range to the last number the loop prints.

7.Follow this code by hand. What is the last number it prints?

for n in range(1, 5):
    print(n)

8.Follow this code by hand. What is the largest number it prints?

for n in range(6, 11):
    print(n * 3)