Why i have to learn c programming for becoming a good developer its not in use in companies for developing....

Question

c programming not in use

Answer 1

https://www.tiobe.com/tiobe-index/

Answer 2

>second most used language
>not in use

Answer 3

which is first?

Answer 4

Java

Answer 5

but where c language us used

Answer 6

and why its become too old