"Polymorphism promotes extensibility by allowing new sub-classes and methods to be added to a class hierarchy without having to modify application programs that already use the hierarchy's interface." ... Via this kind of u may be capable of advertise extensibility within your system by employing Digital function."

What is extensibility in OOP?

Extensibility is a measure of the ability to extend a system and the level of effort required to implement the extension. Extensions can be through the addition of new functionality or through modification of existing functionality. The principle provides for enhancements without impairing existing system functions.

What is good about polymorphism?

Summary. Polymorphism is inherently good. It refers to something having many forms, referring to both objects and methods. Polymorphism allows you to code to an interface that reduces coupling, increases reusability, and makes your code easier to read.