Major advantages of OOPS programming are;
Simplicity: OOPS programming objects model real world objects, so the complexity is reduced and the program structure is clear.
Modularity: Each object forms a separate entity whose internal workings are decoupled from other parts of the system.
Modifiability: It is easy to make minor changes in the data representation or the procedures in an OO program. Changes inside a class do not affect any other part of a program, since the only public interface that the external world has to a class is through the use of methods.
Extensibility: Adding new features or responding to changing operating environments can be solved by introducing a few new objects and modifying some existing ones.
Maintainability: Objects can be maintained separately, making locating and fixing problems easier.
Reusability: Objects can be reused in different programs.