Why methods always return a value in Ruby - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return the sum of two numbers.

Ruby

def add(a, b)
  a [1] b
end

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

The + operator adds two numbers, so the method returns their sum.

2fill in blank

medium

Complete the method to return the last word of a sentence.

Ruby

def last_word(sentence)
  words = sentence.split(' ')
  words.[1]
end

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Apop

Bfirst

Cshift

Dlast

Attempts:

3 left

💡 Hint

Common Mistakes

Using first or shift which return the first element.

The last method returns the last element of an array, which is the last word.

3fill in blank

hard

Fix the error in the method so it returns the square of a number.

Ruby

def square(num)
  num [1] num
end

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A/

B-

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or subtraction instead of multiplication.

The * operator multiplies the number by itself, returning the square.

4fill in blank

hard

Fill the blank to create a method that returns true if a number is even.

Ruby

def even?(num)
  num.[1]
end

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Aeven?

B0

C1

Dodd?

Attempts:

3 left

💡 Hint

Common Mistakes

Using odd? instead of even?.

Integers in Ruby have an even? method that returns true if the number is even and false otherwise.

5fill in blank

hard

Fill all three blanks to create a method that returns a hash of word lengths for words longer than 3 letters.

Ruby

def word_lengths(words)
  lengths = {}
  words.each do |word|
    if word.length [3] 3
      lengths[[1]] = [2]
    end
  end
  lengths
end

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

Aword

Bword.length

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than instead of greater than for filtering.

This creates a hash where keys are words and values are their lengths, but only for words longer than 3 letters.