The collection of integers and their characteristics, including positive and negative integers. Integers consist of ..., -3, -2, -1, 0, 1, 2, 3, etc. This set contains an infinite number of elements and all integers are equally spaced. The sum, subtraction, and multiplication are well-defined for the set of integers, but division is not always defined. The set of integers plays a fundamental role in algebraic structures and is widely used in various areas of mathematics