Grade 9 Computer Science — Looping over a list

1.The program below is run again with each of these lists written into its first line. Match each list to the number the loop counts.

values = [4, 5]
count = 0
for n in values:
    if n > 10:
        count = count + 1

2.This one keeps hold of the smallest value instead, and so it starts from something large. What does it print?

times = [34, 28, 41, 30]
best = 100
for t in times:
    if t < best:
        best = t
print(best)

3.This one multiplies rather than adds, so what it starts from matters. What does it print?

sizes = [2, 3, 4]
product = 1
for s in sizes:
    product = product * s
print(product)

4.Every value in this list has ten added to it before printing. What is the last number the program prints?

nums = [6, 1, 8, 5]
for n in nums:
    print(n + 10)

5.How many numbers does this program print?

values = [11, 4, 9]
for v in values:
    print(v * 2)

6.One line of this program is inside the loop and one is outside it. How many numbers does it print altogether?

prices = [3, 6, 2]
total = 0
for p in prices:
    total = total + p
    print(p)
print(total)

7.This loop keeps hold of the largest value it has met so far. What does it print?

temps = [17, 23, 19, 25, 21]
best = 0
for t in temps:
    if t > best:
        best = t
print(best)

• a) 21
• b) 105
• c) 25
• d) 17

8.This loop does not add the values up. It counts how many of them pass a test. What does it print?

scores = [3, 8, 2, 9, 6]
count = 0
for s in scores:
    if s > 5:
        count = count + 1
print(count)