By analogy with determination of natural numbers, we will formulate determination of integers from Nikolay Khyzhnjak: all numbers which can be got as a result of addition of positive and negative units are named integers.

We will consider examples. Number

**2**(two) is an integer, as it can be got addition of two units:

**1 + 1 = 2**

Number

**-2**(minus two) is an integer, because he can be got by addition of two negative units:

**(-1) + (-1) = -2**

From the determination formulated by me quite logically do we get an answer for a question: "is there a zero by an integer?". Yes, a zero is this integer which can be got addition of positive and negative unit:

**1 + (-1) = 0**

A zero is not a positive or negative number.