Replace this line with your code.
As to "Can you learn c++ on code academy?", I don't see any provision for such.
However, to the linked task, "3. Introduction to Functions in JS", please post your codes.
Hello! Bay was correct however you can vote here --> https://discuss.codecademy.com/t/course-poll/7928
I would highly suggest you do! As it is a possibility C++ is actually a highly considered course and personally I want to keep it that way.
Edit: forgot to add
Basically its for pro and probably only pro unless they make a small easy lesson for non pro.