Subroutine

A subroutine is a piece of program code that is designed to be called by a program. It is not a stand-alone application, so it is not usable in itself. I an real world application, the bulk of the program consists of subroutines. A subroutine can take parameters and return a value.

Let's look at a simple example of a subroutine:

int Max(int a, int b)
  if (a > b) {
    return a;
  }
  return b;
}

How does it work in practice

TBD

FAQs

What is the difference between a function and a subroutine?

The simple answer is: It is the same. Some people will disagree to that, saying that a function operates on local values (the parameters) only, that a function has to return a value. That would mean every function is a subroutine, but not every subroutine is a function. In any case, let's just assume they are the same and it is not worth arguing about.