The integers (from the Latin integer, literally "untouched", hence "whole": the word entire comes from the same origin, but via French) are natural numbers including 0 (0 (number), 1, 2, 3, ...) and their negatives (0, −1, −2, −3, ...). They're numbers that can be written without a fractional or decimal component, and fall within the set If the domain's restricted to Z then each and every member of Z has one and only one corresponding member of N and by the definition of card… (More on Integer)