Counter-based while loop in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print numbers from 1 to 5 using a while loop.

Python

count = 1
while count [1] 5:
    print(count)
    count += 1

Drag options to blanks, or click blank then click option'

A>=

B<

C>

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'count < 5' which stops before printing 5.

Using 'count > 5' which never runs the loop.

The condition count <= 5 ensures the loop runs while count is 1 through 5.

2fill in blank

medium

Complete the code to count down from 10 to 1 using a while loop.

Python

num = 10
while num [1] 0:
    print(num)
    num -= 1

Drag options to blanks, or click blank then click option'

A>=

B>

C<

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'num >= 0' which would print 0 as well.

Using 'num < 0' which never runs the loop.

The condition num > 0 runs the loop while num is greater than zero, counting down to 1.

3fill in blank

hard

Fix the error in the code to print even numbers from 2 to 10 using a while loop.

Python

i = 2
while i [1] 10:
    print(i)
    i += 2

Drag options to blanks, or click blank then click option'

A<=

B<

C>=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'i < 10' which stops before printing 10.

Using 'i > 10' which never runs the loop.

The condition i <= 10 ensures the loop includes 10 in the output.

4fill in blank

hard

Fill both blanks to create a while loop that prints numbers from 3 to 7.

Python

num = 3
while num [1] 7:
    print(num)
    num [2] 1

Drag options to blanks, or click blank then click option'

A<=

B-=

C+=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '<=' which excludes 7.

Using '-=' which decreases the counter and causes an infinite loop.

The loop runs while num <= 7 and increases num by 1 each time with num += 1.

5fill in blank

hard

Fill all three blanks to create a while loop that prints odd numbers from 1 to 9.

Python

n = 1
while n [1] 9:
    print(n)
    n [2] [3]

Drag options to blanks, or click blank then click option'

A<=

B+=

C2

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '<=' which excludes 9.

Using '-' instead of '+=' which decreases the counter.

Using 1 instead of 2 which prints every number, not just odd.

The loop runs while n <= 9, and increases n by 2 each time with n += 2 to print odd numbers.