In languages that allow you to do things like set the value of enumerations, I always start with 1. The reason being that an uninitialized variable, bad outsid

In languages that allow you to do things like set the value of enumerations, I always start with 1. The reason being that an uninitialized variable, bad outside input, etc, is more likely to get caught as bad input rather than whatever happens to be in slot 0.