When using set-builder notation, the typical examples I have found read like this:
>A = {x| 1 <= x <= 10 and x?Z}
That is, A is equal to the set of all elements, x, such that x is greater than or equal to 1, and such that x is equal to or less than 10, and x is an element of Z - the integers.

I learned this stuff in high school but have since forgotten - are integers only comprised of whole numbers?