Floating point numbers can hold integers of a certain size with no loss of precision. a double can safely contain a 32 bit integer. The downsides are that they take up more space and that they are a bit slower. For most users, that will never be an issue. If it is, look into use integers. I don't know the details since I've never had to use it.

20040928 Edit by Corion: Changed title from 'Re: Don't understand, what this means'