For loop (rarely used in Ruby) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

Ruby

for i in [1]
  puts i
end

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

Arange(1,3)

B[1, 2, 3, 4]

C1...3

D1..3

Attempts:

3 left

💡 Hint

Common Mistakes

Using Python-style range function which doesn't exist in Ruby.

Using exclusive range 1...3 which excludes 3.

The for loop iterates over the range 1..3, which includes 1, 2, and 3.

2fill in blank

medium

Complete the code to print each fruit in the array using a for loop.

Ruby

fruits = ["apple", "banana", "cherry"]
for [1] in fruits
  puts fruit
end

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

Afruit

Bitem

Cf

Dfruits

Attempts:

3 left

💡 Hint

Common Mistakes

Using the array name fruits as the loop variable.

Using a variable name that is not used inside the loop.

The variable fruit is used to represent each element in the fruits array during the loop.

3fill in blank

hard

Fix the error in the for loop to correctly print numbers from 1 to 5.

Ruby

for i in [1]
  puts i
end

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

A1...5

B1..5

Crange(1, 5)

D[1, 2, 3, 4]

Attempts:

3 left

💡 Hint

Common Mistakes

Using exclusive range 1...5 which excludes 5.

Using Python-style range which is invalid in Ruby.

The range 1..5 includes the number 5, so the loop prints 1 through 5.

4fill in blank

hard

Fill both blanks to create a for loop that prints only even numbers from 2 to 10.

Ruby

for num in [1]
  puts num if num [2] 0
end

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

A2..10

B% 2 ==

C% 2 !=

D1..10

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong range that starts at 1.

Using % 2 != 0 which checks for odd numbers.

The loop iterates from 2 to 10. The condition num % 2 == 0 checks if the number is even before printing.

5fill in blank

hard

Fill all three blanks to create a for loop that prints squares of numbers from 1 to 5 only if the square is greater than 10.

Ruby

for [1] in [2]
  square = [1] * [1]
  puts square if square > 10
end

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

An

B1..5

Di

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Using a range that does not include 5.

The loop variable n goes from 1 to 5. The square is calculated by multiplying n by itself. Only squares greater than 10 are printed.