Purpose of all these languages is same. But Why we are learning so many languages ....?

Answer 1

Every language has its own caliber and each language developed after some language already exists will be advanced of existing.
Ultimately, main purpose of a programmer is to write a code which passes the test of Time complexity and space complexity which means a code should take less time to execute and less space,this will increase efficiency of system.
Languages will help in achieving the task.

Languages like python and ruby takes less space in Code segment when compared to C or C++ and Ruby is much faster.

Answer 2

thank you prasad garu to explain it clearly

Answer 3

Analogy is like did you use knife or axe for choping big tree?!, what is the poin did you understand ? , the poin is efficiency, fast programing, and easy way, programing langguanges is just tools concept is same with diffrent style script, us just said is same to hehe