Chapter 11.5, Problem 11.20CP

Program Plan Intro

Interface:

• The purpose of an interface is to specify the behavior of a class.
• An interface is almost similar to a class that contains abstract methods and/or properties.
• An interface declaration is similar to a class declaration.
• Instead of using class keyword, interface keyword is used in interface declaration.
• An interface does not specify how the class must implement the contained methods and properties.