Programming (OOP) uses a different set of programming languages than old procedural
programming languages (C, Pascal, etc.). Everything in OOP is grouped as self sustainable
"objects". Hence, you gain re-usability by means of four main object-oriented programming
concepts.
In order to clearly understand the object orientation, let’s take your “hand” as an example. The
“hand” is a class. Your body has two objects of type hand, named left hand and right hand. Their
main functions are controlled/ managed by a set of electrical signals sent through your shoulders
(through an interface). So the shoulder is an interface which your body uses to interact with your
hands. The hand is a well architected class. The hand is being re-used to create the left hand and
the right hand by slightly changing the properties of it.