Looping Unit

Which of the following for loops would print the following numbers? 0 1 2 3 4 5

• for i in range(5): print(i)

• for i in range(1, 5, 1): print(i)

• for i in range(6): print(i)

• for i in range(0, 5, 1): print(i)

Which of the following for loops would print the following numbers? 3 5 7 9

• for i in range(3, 10, 2): print(i)

• for i in range(3, 9, 2): print(i)

• for i in range(9): print(i)

• for i in range(3,9): print(i)

What is the value of num when this loop completes?
num = 0

for i in range (2, 8, 2)
num = num + i

• 2

• 8

• 12

• 20

Which of the following for loops will give the same values for i as the loop below? for i in range(10):

• for i in range(11, 0)

• for i in range(10, 0, -1)

• for i in range(0, 10)

• for i in range(0, 11, 1)

Three of the for loops below will provide identical values for i. Which for loop will provide values that do not match the others?

• for i in range(0, 5)

• for i in range(5)

• for i in range(0, 5, 1)

• for i in range(5, 0, 1)

Which of the following while loops would continue to loop as long as num has values between the range of 3-12, exclusive?

• while num > 12 and num < 3:

• while num < 12 or num < 3:

• while num <= 12 and num >= 3:

• while num < 12 and num > 3:

Which of the following while loops will cause an infinite loop?

• A. secret_num = 10 while secret_num == 10: secret_num = secret_num - 1

• B. secret_num = 10 while secret_num == 10: print(secret_num)

• C. secret_num = 10 while secret_num > 0: secret_num = secret_num - 1

• D. secret_num = 10 while secret_num != 10: print(secret_num)

When would a while loop be a better control structure to use than a for loop?

• When you need to repeat multiple commands

• When you need to repeat something 5 times

• When you don’t know how many times something will need to repeat

• When the user is inputting how many times to repeat something

What will be printed to the screen when this program is run?
for j in range (2):
for i in range(0, 2, 1):

print (i)

• 0 1 0 1

• 0 2

• 0 1 0 1 0 1

• 1 2 1 2 1 2

What is the value of sum when this loop completes?
sum = 0
for i in range(3):
sum = sum + 5
for j in range(2):
sum = sum - 1

• A. 8

• B. 9

• C. 20

• D. 0