Handy Guide to How Many Delegates Will Be At Play In Democratic Primary in Florida

Zero is a number which quantifies a count or an amount of null size; that is, if the number of your brothers is zero, that means the same thing as having no brothers, and if something has a weight of zero, it has no weight. If the difference between the number of pieces in two piles is zero, it means the two piles have an equal number of pieces.

Before counting starts, the result can be assumed to be zero; that is the number of items counted before you count the first item and counting the first item brings the result to one. And if there are no items to be counted, zero remains the final result.

While mathematicians accept zero as a number, some non-mathematicians would say that zero is not a number, arguing that one cannot have zero of something (for example, 'zero oranges'). Others hold that if one has a bank balance of zero, one has a specific quantity of money in that account, namely none.

Almost all historians omit the year zero from the proleptic Gregorian and Julian calendars, but astronomers include it in these same calendars. However, the phrase Year Zero may be used to describe any event considered so significant that it serves as a new base point in time.

http://en.wikipedia.org/wiki/0_(number)