Saturday, October 13, 2018

 SOULhttps://en.m.wikipedia.org/wiki/Integer


Integer

An integer (from the Latin integermeaning "whole")[note 1] is a number that can be written without a fractional component. For example, 21, 4, 0, and −2048 are integers, while 9.75, 5 1/2, and 2 are not.
The set of integers consists of zero (0), the positive natural numbers (123, …), also called whole numbers or counting numbers,[1][2] and their additive inverses (the negative integers, i.e., −1, −2, −3, …). The set of integers is often denoted by a boldface Z ("Z") or blackboard bold  (Unicode U+2124 ℤ) standing for the German word Zahlen([ˈtsaːlən], "numbers").[3][4]
Z is a subset of the set of all rationalnumbers Q, in turn a subset of the realnumbers R. Like the natural numbers, Zis countably infinite.
The integers form the smallest groupand the smallest ring containing the natural numbers. In algebraic number theory, the integers are sometimes qualified as rational integers to distinguish them from the more general algebraic integers. In fact, the (rational) integers are the algebraic integers that are also rational numbers.

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