How do I use modules in Ruby?

How do I use modules in Ruby?

In Ruby, modules are used to group related methods, classes, and constants. You can include a module in a class using the include keyword.

Can you give me an example of a module?

Sure! Here's a simple example:

module Greetings
  def hello
    puts 'Hello!'
  end
end

How do I include this module in a class?

You can include the module in a class like this:

class Person
  include Greetings
end

person = Person.new
person.hello  # Outputs 'Hello!'

What if I want to use the module in multiple classes?

You can include the same module in multiple classes. Each class will have access to the methods defined in the module.