This document compares procedure oriented programming (POP) and object oriented programming (OOP). POP focuses on functions and procedures, while OOP focuses on objects. In POP, data can move freely between functions, whereas in OOP objects control their own data and it does not transfer between objects. OOP provides better data hiding, encapsulation, inheritance and polymorphism compared to POP. Examples of POP languages include C and FORTRAN, while examples of OOP languages include C++, Java, and C#.

1. Compare between Procedure Oriented Programming(pop)
&
Object Oriented Programming(oop)
Prepared By .Md Ibrahim Khalil.
Islamic University ,Bangladesh.
Department of Electrical and Electronic
Engineering.

2. DIFFERENCE BETWEEN POP AND OOP
FOCUS Procedure Oriented
Programming(POP)
Object Oriented
Programming(OOP)
Stands for
It stands for ‘Procedural
Orientated Programming’.
It stands for ‘Object
Orientated Programming’.
Programs In POP, program is divided into
small parts called functions.
In OOP, program is divided
into parts called objects.
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.
Data
Every function contains
different data.
The data and functions of
each individual object act
like a single unit.

3. FOCUS Procedure Oriented
Programming(POP)
Object Oriented
Programming(OOP)
Data control
Most of the functions use
global data.
Each object controls its
own data.
Transfer
Same data may be
transferable from one
function to another.
Data does not possibly
transfer from one object to
another.
Data Access In POP, 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 or private so we can
control the access of data.
Data hiding
POP does not have any
proper way for hiding data
so it is less secure.
OOP provides data hiding
so provides more security.

4. Procedure Oriented
Programming(POP)
Object Oriented
Programming(OOP)
Communication
Functions communicate with
other functions maintaining as
usual rules.
One object links with the other
using the message passing.
Addition
More data or functions cannot be
added with the program if
necessary. For this purpose, the
full program needs to be change.
To add new data and function in
POP is not so easy.
More data or functions can be
added with the program if
necessary. For this purpose, the
full program need not be
changed.
OOP provides an easy way to
add new data and function.
Permission
To add new data in program, the
user should ensure that the
function allows it.
Message passing ensures the
permission of accessing member
of an object from another object.

5. Procedure Oriented
Programming(POP)
Object Oriented
Programming(OOP)
Importance
Functions or algorithms get
more importance than data in
program.
Data gets more importance than
functions in program.
Overloading
Overloading is not possible. Overloading is possible in the form
of Function Overloading and
Operator Overloading.
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.

6. FOCUS Procedure Oriented
Programming(POP)
Object Oriented
Programming(OOP)
Process
POP follows Top Down
approach.
OOP follows Bottom Up
approach.
Access Specifiers
No access specifiers are used. Public, private, and protected
access specifiers are used.
Examples Example of POP are : C, VB,
FORTRAN, Pascal.
Example of OOP are : C++,
JAVA, VB.NET, C#.NET.