Track 11 · Lesson 3 of 12

Methods

Give objects behaviour with instance methods that change their state or report on it, and chain calls by returning self.

You will be able to

• Define instance methods and call them on objects
• Distinguish methods that change an object's state from methods that return a value
• Call one method from another through self
• Validate method arguments so an object's state stays consistent
• Return self to allow method chaining