Question

what are the advantage of function​

Answer 1

Avoid repetition of codes.
Increases program readability.
Divide a complex problem into simpler ones.
Reduces chances of error.
Modifying a program becomes easier by using function

Answer 2

Basically Function in sense of computer language refers to a call that will call a specific equation from the user stored library. Just simply write a logic for a specific taks and whenever you need to call the logic again in the program, you don't have to write code again. Just call the function and the compiler will itself call the logic from the library.