It is the additive identity.
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It would stay always stay negative if you're adding 2 negative integers.
-- Their sum and difference both have the same sign that the two integers have. -- Their product and quotient are both positive.
all number can be negative or positive. :) The term "whole numbers" is ambiguous; sometimes it is used for integers, sometimes only for non-negative integers. It is better to use the more precise terms "integers", "positive integers", "non-negative integers", depending on what you want to say. it is also false if your looking for this answer caue it could be like 0.3,0.5 there not whole numbers
When both are positive or both are negative.
Mostly every job out there.... I probly cant name one job that doesn't use integers. But probably a mathematician or a teacher i would say