What is the simply meaning of object oriented?

Answer 1

The short explanation is that it is computer programming that involves classes and objects.

A class is a template to create objects; it can also be considered as a data type. Classes allow you to create new data types; for example, you could create a class to handle dates, points in 3D space, etc. Functions, instead of being independent, are associated with a class (and therefore with objects based on the class); such functions are known as "methods". The objects, of course, also need to store data; variables at the class/object level are known as "fields".