Polymorphism

• Polymorphism comprises two words- poly and morphism.
• "Poly" means "many" and "morphism" means “forms”. 
• Therefore polymorphism means many forms. i.e. method has the same name but different or many functionalities.

Examples: Take a real-life example of a person, at the same time a person can be a student, a teacher, an employee, a son, a father, etc. The person is the same but his behavior or functionality is different in different situations.

• There are two types of polymorphism:
  1. Compile time Polymorphism
  2. Runtime Polymorphism
   
• We can achieve polymorphism in two ways:
  1. Method overloading
  2. Method overriding