In the previous post we’ve looked at several ways to communicate to the user of a function that something could go wrong, or that maybe the function couldn’t produce the result that the user was looking for. In the case of an average function, we’d want to communicate to the user that in some cases the function can’t produce a meaningful result, namely if the array of numbers is empty. This isn’t really an error, it’s just that we don’t have a way to answer the question “what...
