en.wikipedia.org/wiki/Integer

An integer is a number that can be written without a fractional component. For
example, 21, 4, ... Some authors use ℤ^{*} for non-zero integers, others use it for
non-**negative integers**, or for {–1, 1}. Additionally, ℤp is used to denote either the
set of ...

mathworld.wolfram.com/NegativeInteger.html

A **negative integer** is one of the integers ..., -4 , -3 , -2 , -1 obtained by negating
the positive integers. The **negative integers** are commonly denoted Z^- .

study.com/academy/lesson/negative-integers-definition-rules-examples.html

This lesson will be covering the world of **negative integers**. What is a **negative**
**integer**? How do they work? Also, we will be looking at real...

www.mathsisfun.com/positive-negative-integers.html

Let us think about numbers as balloons (positive) and weights (**negative**): ... Now
let's see what adding and subtracting **negative** numbers looks like: .... Number
Line Using The Number Line Whole Numbers and **Integers** Multiplying Negatives
...

www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-sub-neg-intro/v/adding-and-subtracting-negative-number-examples

Learn how to add and subtract **negative** numbers. The problems solved in this
video are 2 - 3 = -1 and -2 - 3 = -5 and -2 + 3 = 1 and 2 - (-3) = 5 and -2 - (-3).

www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract/cc-7th-add-sub-negative-numbers-with-variables/e/integer-addition-and-subtraction-with-substitution

Practice plugging in values to evaluate **negative** number addition and subtraction
expressions.

www.mathleague.com/index.php/about-the-math-league/mathreference?id=82

Positive integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5, ... .
**Negative integers** are all the ...

www.mathgoodies.com/lessons/vol5/intro_integers

Whole numbers less than zero are called **negative integers**. These numbers are
to the left of zero on the number line. The integer zero is neutral. It is neither ...

web.cerritos.edu/dford/SitePages/Math_40/Math40Lesson6.pdf

Positive integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5, . ... For
each positive integer, there is a **negative integer**, and these integers are called.