What is polymorphism?

Polymorphism is the process of “an object can exhibit different type of  behavior at different instances.”
This polymorphism has 2 types.

1.      Function overloading :

The process of defining multiple methods “with same name and different signatures(parameter type/list)”                                    Or

A class can have more than one function “with same name and different signatures(parameter type/list)”

2.      Function overriding:

The process “redefining super class methods into sub classes” called function overriding

                                                            Or

A class can have more than one function “with same name and same signatures(parameter type/list)”.