for loop quiz

What does a for loop do?

• Repeats a block of code

• Skips a line

• Runs code once

• Stops the program

Answer explanation

For loop repeats code for each item or number

What is the output?

for i in range(3):

print(i)

• 1 2 3

• 0 1 2

• 0 1 2 3

• 1 2

Answer explanation

range(3) goes from 0 to 2

for i in range(1, 4) will print:

• 1 2 3

• 0 1 2

• 1 2 3 4

• 2 3 4

Answer explanation

Starts at 1, stops before 4

Which is the correct for loop syntax?

• for i in range(5):

• for i = 5

• for i -> 5

• for in range(5)

Answer explanation

Python uses for variable in range():

What does range(2, 10, 2) do?

• 2 to 10

• 2, 4, 6, 8

• 2, 4, 6, 8, 10

• 1, 2, 3, 4

Answer explanation

Step of 2 means it skips numbers

What is the output?

for ch in "hi":

print(ch)

• hi

• h i

• i h

• Error

Answer explanation

Loops over each character

What data type works with a for loop?

• Only numbers

• Strings, lists, ranges

• Only strings

• Only booleans

Answer explanation

Can loop over anything that’s a sequence

Which loop prints even numbers from 0 to 8?

• for i in range(0, 10, 2)

• for i in range(10)

• for i in range(1, 10)

• for i in 2, 4, 6, 8

Answer explanation

Step of 2 gives even numbers

What will this code print?

for i in range(1, 5):

print("Hello")

• Hello 4 times

• Hello 5 times

• Hello 3 times

Answer explanation

Runs loop from 1 to 4

What does this loop do?

names = ["Ali", "Sara"]

for n in names:

print(n)

• Error

• Prints Ali and Sara

• Prints list

• Prints only Sara

Answer explanation

Loops over each item in the list