There has been some debate on the efficiency of the new number types in AS3: int, uint and Number. So whats the most efficient? Answer: They are all almost the same. Performance difference only occurs when you convert the datatype (via casting) in code. Join discussion...

The Number datatype's initial value is NaN. You cannot use n==null to test if that value has been set or not (it'll always return false). Instead use isNaN(n) Join discussion...