What is the most popular programing language. What is the most usefull.

Answer 1

java is the most popular general purpose programming language according to number of authors and contributors to GitHub. Java script is the most popular language overall if you don't mind it being non general but specific language for the web browser; also based on number of contributors and authors on github.

which is the most useful? this is like asking which cutting tools are more useful, knife or scissors?

Answer 2

Duplicate, I get tired of writing always the same post. Please search if you have a question which was almost certainly already asked.
Nothing against you, I've also got such replies when I began. But it's really time consuming for replyers.