Difference between Front and back end language?

Question

what is the difference between front end and back end language?

Answer 1

front end languages are used to code web pages, like html for structure, css for design, js for interactivity.
back end languages are server side programs, like php and perl to process user requests, send pages, etc.

Answer 2

Back end language only run on a single web server.

Front end language run on the visitor devices that access it, maybe your phone, my browser or other gadgets.

Answer 3

Front end languages are executed on the user's device, while backend languages are executed on server side.
For example, in your php file (using a backend language) you can generate using a loop a certain number of html tag.
The server generate these tag and then send to the user the html file resulting of this generation. So the user have only access to the result of that in html. It's not clear but I hope that it will help you