What is use of C programming language??

Answer 1

Anything you can imagine. C is everywhere. However, it's a bit lower level than other languages. Meaning there is less abstraction, thus running faster; however it means you have to write more code. So if you are to use C, you need to weigh the pros and cons of speed of the code running vs speed of writing the code.

Generally, C is used for embedded programming into hardware, and operating systems.

Answer 2

you can write an os with it

Answer 3

C is the base of programming. All you need to start with C before moving to any other language to get your concepts as well as logics strong.