break to exit a loop

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. What does the break keyword do inside a loop?

A It pauses the loop for one second

B It stops the loop straight away

2. Which loop runs forever unless something inside it uses break?

A while True:

B for i in range(3):

3. After break runs, which line does Python run next?

A The first line after the loop

B The first line inside the loop again

4. Which code uses break correctly?

A if guess == 7: break

B if guess == 7: break

5. A student writes this loop: while True: print("Hi") What happens?

A It prints Hi once and then stops

B It prints Hi forever because there is no break

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1break		AThere is no break, so the loop never ends and the program runs forever. Add an if statement with break inside the loop.
2while True:		Bwhile True: break print('Done')
3Exit a loop when the user types 'quit'		Cif answer == 'quit': break
4The line after the loop runs once break has ended the loop		DStarts a loop that keeps running forever until a break is reached
5while True: name = input('Name: ') print(name)		EThe break is not indented, so it is outside the loop and cannot end it. It must be indented inside the loop, usually under an if.
6while True: age = int(input('Age: ')) break		FStops the loop it is in straight away and jumps to the first line after the loop

Definitions

break

Fill in the Blanks

Complete each line of code by filling in the missing parts.

while True: if input("Quit? ") == "y": _____

while ____: if input("Quit? ") == "y": break

while True: __ input("Quit? ") == "y": break

while True: if int(input("Guess: ")) __ 7: break

_____ True: if input("Quit? ") == "y": break

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A score = 0

B while true:

C score += 2

D if score >= 10:

E break

F print(score)

Question 2

A while True

B pw = input('Password: ')

C if pw == 'cat':

D break

E print('Welcome')

Question 3

A while True:

B n = int(input('Number: '))

C if n = 0:

D break

E print('Done')

Question 4

A while True:

B cmd = input('Go? ')

C if cmd == 'stop':

D brake

E print('Stopped')

Question 5

A while True:

B age = int(input('Age: '))

C if age > 0

D break

E print('Thanks')

Answer Key

break to exit a loop

Section A: Quick Questions

B — It stops the loop straight away

A — while True:

A — The first line after the loop

A — if guess == 7: break

B — It prints Hi forever because there is no break

Section B: Match the Pairs

break → Stops the loop it is in straight away and jumps to the first line after the loop

while True: → Starts a loop that keeps running forever until a break is reached

Exit a loop when the user types 'quit' → if answer == 'quit': break

The line after the loop runs once break has ended the loop → while True: break print('Done')

while True: name = input('Name: ') print(name) → There is no break, so the loop never ends and the program runs forever. Add an if statement with break inside the loop.

while True: age = int(input('Age: ')) break → The break is not indented, so it is outside the loop and cannot end it. It must be indented inside the loop, usually under an if.

Section C: Definitions

break — A keyword that stops the loop it is in straight away. The program then carries on with the first line after the loop. It is often used inside while True to exit when a condition is met.

Section D: Fill in the Blanks

while True:
    if input("Quit? ") == "y":
        break

while True:
    if input("Quit? ") == "y":
        break

while True:
    if input("Quit? ") == "y":
        break

while True:
    if int(input("Guess: ")) == 7:
        break

while True:
    if input("Quit? ") == "y":
        break

Section E: Spot the Error

B — True must start with a capital letter in Python. Lowercase true is not a keyword, so Python gives a NameError. It should be while True:

A — The while line is missing a colon at the end. Python needs the colon before the indented loop body. It should be while True:

C — A single = assigns a value. An if condition needs == to compare. It should be if n == 0: so the loop can break when the number is 0.

D — The keyword is spelled break, not brake. Python does not know brake, so the loop would not exit. It should be break.

C — The if line is missing its colon. Python needs a colon at the end of the line before the indented break. It should be if age > 0: