Chapter 7a - While Loop

A while loop repeats as long as the test is true.

n = 3
while n > 0:
    print(n)
    n = n - 1

🧪 Try it

Mini quiz — while test

Quiz

while test

1 / 2

How many numbers are printed before done?

n = 3
while n > 0:
  print(n)
  n = n - 1
print("done")

Pick an answer to see if you are right.

Challenge: countdown

Write countdown(n) so it prints n, then n-1, ... then 1 (do not print 0).

Expected for 3:

3
2
1

Mini quiz — while

Quiz

while

1 / 1

When does a while loop stop?

Pick an answer to see if you are right.

Exercises

Activity: Keep going?

Write keep_going(letter) so it returns True if the letter is y, otherwise False. (This is the question you ask at the end of a while loop.)