Integer is a set of positive integers, zero and negative integers.

brief introduction

All integers form an integer set, which is a number ring. In the integer system, zero and positive integers are collectively called natural numbers. -1, -2, -3, …, -n, …(n is a non-zero natural number) are negative integers. Positive integers, zero integers and negative integers form an integer system. Integers exclude decimals and fractions.

If the product of a finite number of integers is odd, then every integer is odd; If the product of a finite number of integers is even, at least one of these integers is even; The sum and difference of two integers have the same parity; If the square root of an integer is an integer, then both have the same parity.