Instance methods in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an instance method named greet inside the Person class.

Ruby

class Person
  def [1]
    puts "Hello!"
  end
end

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

Agreet

Bgreeting

Csay_hello

Dhello

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different method name than 'greet'.

Defining the method outside the class.

The method name should be greet as specified. This defines an instance method that can be called on Person objects.

2fill in blank

medium

Complete the code to call the instance method greet on the person object.

Ruby

person = Person.new
person.[1]

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

Agreeting

Bsay_hello

Chello

Dgreet

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a method name that does not exist.

Forgetting the dot before the method name.

To call the instance method greet, use person.greet.

3fill in blank

hard

Fix the error in the instance method definition by completing the method name correctly.

Ruby

class Animal
  def [1]
    puts "I am an animal"
  end
end

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

Aanimal_speak

BSpeak

Cspeak

Dspeak!

Attempts:

3 left

💡 Hint

Common Mistakes

Starting method name with uppercase letter.

Adding special characters to method names.

Method names in Ruby should start with a lowercase letter and speak is the correct conventional name here.

4fill in blank

hard

Fill both blanks to define an instance method age_in_dog_years that returns the age multiplied by 7.

Ruby

class Dog
  def [1]
    @age [2] 7
  end
end

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

Aage_in_dog_years

B*

C+

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or subtraction instead of multiplication.

Incorrect method name.

The method name is age_in_dog_years and the multiplication operator * is used to multiply age by 7.

5fill in blank

hard

Complete the code to define an instance method full_name that returns the first and last name joined with a space.

Ruby

class User
  def [1]
    "#{@first_name} #{@last_name}"
  end
end

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

Afull_name

C+

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using + or - instead of space.

Forgetting the space between names.

The method full_name returns the first and last name joined by a space using string interpolation.