Integer

An integer is one of the following numbers, extending infinitely in both directions (..., -2, -1, 0, 1, 2, ...). The common mathematical symbol is <math>\mathbb{Z}</math> (blackboard bold).

A digital computer can't work with infinite precision and different implementations have different limits. The ALU usually has a fixed limit anywhere from 8 to 128 bit but all digital computers have the ability to do math (slowly) with a precision that is only limited to the amount of memory accessible.