Difference between OOps and POP

Procedure Oriented Programming

Object-Oriented Programming

Divided Into

In POP, the program is divided into small parts called functions.

In OOP, the program is divided into parts called objects.

Importance

In POP, Importance is not given to data but to functions as well as a sequence of actions to be done.

In OOP, Importance is given to the data rather than procedures or functions because it works as a real world.

Emphasizing

Emphasizes on functions.

Emphasizes on data.

Approach

POP follows Top-Down approach.

OOP follows Bottom-Up approach.

Access Specifiers

POP does not have any access specifier.

OOP has access to specifiers named Public, Private, Protected, etc.

Data Moving

In POP, Data can move freely from function to function in the system.

In OOP, objects can move and communicate with each other through member functions.

Passing of data

Data may get passed from one function to another.

Data never get passed from one object to another.

Expansion

To add new data and function in POP is not so easy.

OOP provides an easy way to add new data and functions.

Modification of program

Modification of a completed program is very difficult and it may affect the whole program.

Modifications are easy as objects stay independent to declare and define.

Data Access

In POP, the Most function uses Global data for sharing that can be accessed freely from function to function in the system.

In OOP, data can not move easily from function to function, it can be kept public,  private or protected, so we can control the access of data.

Data Hiding

POP does not have any proper way of hiding data so it is less secure.

OOP provides Data Hiding so it provides more security.

Data identification

In large programs, it is very difficult to find what data has been used by which function.

As data and functions stay close, it is easy to identify data.

Overloading

In POP, Overloading is not possible.

In OOP, overloading is possible in the form of Function Overloading and Operator Overloading.

Examples

Example of POP is: C, VB, FORTRAN, Pascal.

Example of OOP is: C++, JAVA, VB.NET, C#.NET.