What's the difference between functional programming and object oriented programming

Question

I was recently searching about paradigms and found out some interesting information
I see almost the speak was about procedural, functional & object oriented programming
what's your thoughts about it , did you use them all before ?
which one is your favorite and why?

Answer 1

Functional programming isn't procedural programming.
Functional programing paradigm is designed around principles you can find in lambda calculus.
OOP is based like procedural paradigm upon turing machine.

When you handle data structures that involves mutation of values like matrix, you favor paradigm like OOP, when you handle recursive datastructure, you will favor functional programming.

In OOP you describe how to solve a problem, in functional programming you have a declarative approach, you describe what the problem is.

There is a lot of technical differences, but what is important is that OOP and functional programming are based upon different fundations, imply different way of thinking, and are not efficient on the same kinds of data structures.

To conclude, knowing both approaches is a very useful.

Answer 2

well personally I prefer functional as it faster in terms of performance
and make the program less in size compared to OOP one
and little effort are made with functional compared to OOP