Quiz: Loops

What does this program print?

for number in range(2, 10, 3):
    print(number)

• 2, 5 and 8, each number on a line of its own
• 2, 5, 8 and 11
• 3, 6 and 9
• 2, 3, 4, 5, 6, 7, 8 and 9

How often does for i in range(5): print("Hello") print the greeting?

• Four times
• Five times
• Six times

What does this program print?

total = 0
for number in [4, 7, 1, 8]:
    if number > 3:
        total += number
print(total)

• 20
• 19
• 3
• 8

Someone wants to add up the prices and gets 3.5. Why?

for price in [2.5, 1.0, 3.5]:
    total = 0
    total += price
print(total)

• print() is in the wrong place and should be indented.
• total = 0 is in the body and resets the sum in every round.
• += does not calculate reliably with decimal numbers.

What does this program print?

number = 100
rounds = 0
while number > 10:
    number = number // 2
    rounds += 1
print(rounds, number)

• 4 6
• 3 12
• 4 6.25
• 5 3

Which of these loops never stop if count is 0 beforehand? (several are right)

• while count < 3: print(count)
• while count < 3: count += 1
• while count < 3: count -= 1
• while count > 3: count += 1

For which tasks is while the right loop? (several are right)

• Writing every item of a shopping list on a line of its own
• Asking for the age until a number above 0 is entered
• Printing the numbers from 1 to 10
• Working out after how many years savings have doubled

What does this program print?

for number, item in enumerate(["milk", "bread"], start=1):
    print(number, item)

• 0 milk and 1 bread
• 1 milk and 2 bread
• milk 1 and bread 2