Explore OOP in Ruby to gain a deeper understanding of Ruby objects, Ruby methods, and Ruby classes, enabling you to solve multiple problem sets with an object-oriented approach.

Become a Ruby Developer

Module Overview
Ruby is a smart, functional, and object-oriented programming language that blends the best features of scripting power with user-friendly syntax. In this module, we’ll dive into OOP in Ruby with hands-on practice using interactive exercises and illustrations. We'll start by creating and managing Ruby objects. Next, we’ll explore Ruby methods and blocks, essential tools in Ruby programming. Finally, we'll delve into Ruby classes and how they are used to implement OOP principles.

Ruby OOP (Object-Oriented Programming)

## Class methods

Like class variables, methods can be defined at the class level. Such methods are called **class methods**.

- Class methods are defined by prepending the method name with `self.`. For example, in the following code snippet, `greet` is a class method.

```ruby
class Person
 def self.greet()
  puts "Hello World!"
 end
end
```

- The `self` keyword refers to the class itself. So, to call the class method, it has to be invoked on the class and not on a class instance. For example:

# Class methods

Like class variables, methods can be defined at the class level. Such methods are called **class methods**.

- Class methods are defined by prepending the method name with `self.`. For example, in the following code snippet, `greet` is a class method.

```ruby
class Person
 def self.greet()
  puts "Hello World!"
 end
end
```

- The `self` keyword refers to the class itself. So, to call the class method, it has to be invoked on the class and not on a class instance. For example:

Practice using class variables and class methods.

Objects

Blocks

Conditionals

Writing Classes

Mini project 1

Conclusion

Exercise 2: On Class Methods

Class methods