> I disagree with your case, this is clearly an error because it should never get to dividing by 0. You MUST validate user input and user input validation failures are a class of errors not exceptions.
This is bizarre: it sounds like you're disagreeing with me, by agreeing with me (that this is an error, not an exception)! For the confused (myself included), please realize that lost953's argument is considered "begging the question" (a logical fallacy [1]): You're using your a-priori assumption that 'divide by zero' is an exception, to argue that what we really should be doing here is add an if-guard before the "actual divide" occurs, so we can return an error, instead of an exception!
Otherwise, thank you for conceding that exceptions are just a category of error :)