Nested for loop execution in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print numbers from 1 to 3 using a for loop.

Python

for i in [1]:
    print(i)

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A[1, 2]

Blist(3)

C3

Drange(1, 4)

Attempts:

3 left

💡 Hint

Common Mistakes

Using a single number like 3 instead of a range.

Using a list with fewer numbers than needed.

The range(1, 4) function generates numbers 1, 2, and 3, which the loop prints.

2fill in blank

medium

Complete the code to print all pairs of numbers from 1 to 2 using nested loops.

Python

for i in range(1, 3):
    for j in [1]:
        print(i, j)

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A[1, 2, 3]

Brange(0, 2)

Crange(1, 3)

Drange(3, 5)

Attempts:

3 left

💡 Hint

Common Mistakes

Using a range that starts at 0 or goes beyond 2.

Using a list with incorrect numbers.

The inner loop uses range(1, 3) to match the outer loop's range, printing pairs (1,1), (1,2), (2,1), and (2,2).

3fill in blank

hard

Fix the error in the nested loop to print all pairs of letters and numbers.

Python

letters = ['a', 'b']
numbers = [1, 2]
for letter in letters:
    for num in [1]:
        print(letter, num)

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Arange(1, 3)

Bnumbers

Cletters

Dletter

Attempts:

3 left

💡 Hint

Common Mistakes

Using the outer loop variable letter inside the inner loop.

Using the wrong list like letters again.

The inner loop should iterate over the numbers list to pair each letter with each number.

4fill in blank

hard

Fill both blanks to create a nested loop that prints all combinations of colors and sizes.

Python

colors = ['red', 'blue']
sizes = ['S', 'M']
for [1] in colors:
    for [2] in sizes:
        print(color, size)

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Acolor

Bsize

Citem

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same variable name for both loops.

Using generic names like item or value that don't match the print statement.

The outer loop variable is color and the inner loop variable is size to match the lists and print correctly.

5fill in blank

hard

Fill all three blanks to create a nested loop that builds a dictionary with keys as colors and values as sizes.

Python

colors = ['red', 'green']
sizes = ['L', 'XL']
combo_dict = {}
for [1] in colors:
    for [2] in sizes:
        combo_dict[[3]] = size
print(combo_dict)

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

Acolor

Bsize

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong variable as dictionary key.

Mixing up variable names in the assignment.

The outer loop variable is color, the inner loop variable is size, and the dictionary key is color to store the last size for each color.