Class declaration syntax in Ruby - Mini Project: Build & Apply

Class declaration syntax

📖 Scenario: You want to organize information about a simple object in your program. Using a class helps you group related data and actions together.

🎯 Goal: Create a Ruby class named Car with a method to show its model.

📋 What You'll Learn

Create a class named Car

Add an initialize method that takes a model parameter

Store the model in an instance variable

Add a method show_model that returns the model

Create an object of class Car with model "Toyota"

Print the result of calling show_model on the object

💡 Why This Matters

🌍 Real World

Classes help organize data and behavior for real-world objects like cars, users, or products in software.

💼 Career

Understanding class syntax is essential for Ruby developers building applications with reusable and organized code.

1

Create the Car class

Write a class declaration named Car with an empty body.

Ruby

class Car
  # Your code here
end

Need a hint?

Use class Car to start and end to finish the class.

2

Add the initialize method

Inside the Car class, write an initialize method that takes a parameter model and stores it in an instance variable @model.

Ruby

class Car
  def initialize(model)
    # Your code here
  end
end

Need a hint?

Use def initialize(model) and assign @model = model.

3

Add the show_model method

Inside the Car class, add a method named show_model that returns the instance variable @model.

Ruby

class Car
  def initialize(model)
    @model = model
  end

  def show_model
    # Your code here
  end
end

Need a hint?

Define def show_model and return @model.

4

Create an object and print the model

Create an object my_car of class Car with model "Toyota". Then print the result of calling show_model on my_car.

Ruby

class Car
  def initialize(model)
    @model = model
  end

  def show_model
    @model
  end
end

# Your code here

Need a hint?

Create the object with Car.new("Toyota") and print with puts.