What is the difference between front end and back end developers.

Question

difference between back end and front end devolopers

Answer 1

You can see my comments in very interactive way, that's done by front end developers means the things that can be seen.
But you cannot see the coding behind this comment section because it is hidden (called abstraction), done by back end developers.

Answer 2

For example in a web application a front-end developer develops the user interface (the code which generates HTML, css, js) , a back-end developer develops the service and database layer.