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What is object-oriented programming (OOP)?
Object-oriented programming (#OOP) is a computer programming model that organizes software design around data, or objects, rather than functions and logic. An object can be defined as a data field that has unique attributes and behavior.
#constructors 
Polymorphism. Objects are designed to share behaviors, and they can take on more than one form. The program determines which meaning or usage is necessary for each execution of that object from a parent class, reducing the need to duplicate code. A child class is then created, which extends the functionality of the parent class. Polymorphism enables different types of objects to pass through the same interface