Ruby Classes & Modules

Syntax

class Greeter
  def initialize(name)
    @name = name
  end
end

Examples

class Greeter
  def initialize(name)
    @name = name
  end

  def greet
    "Hello, #{@name}!"
  end
end

puts Greeter.new("Ada").greet

Best practices

• Keep instance state private behind clear methods; expose only the operations callers genuinely need.
• Keep examples small while learning, then combine the idea with a real project.

At a glance

Purpose

Expressive scripting and applications

File extension

.rb

Runs in

Ruby interpreter

Usually used with

Ruby standard library and gems

Specifications & further reading

• Ruby documentation

Related Ruby documentation