INTEGERS
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The set of integers (ℤ) is the set of the positive whole numbers and their additive opposites (the negative whole numbers).
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Apart from zero (which is its own opposite), the opposites of whole numbers are also whole numbers. You have the set of whole numbers which is also known as the set of integers.
The elements of the set ... -2, -1, 0, 1, 2, ... are known as integers
They are called rational numbers. The set of rational numbers contains the opposites of its members.