The integers are a set of numbers consisting of all negative whole numbers, all positive whole numbers, and zero. These are a subset of the real numbers.

## Quick facts about the integers

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Many problems in mathematics involve working with integers. The following are some quick facts about this set of numbers.

- Zero is an integer.
- All even and positive numbers are integers (since they are whole numbers).
- The product of two integers is an integer.
- The sum or difference of two integers is an integer.
- The symbol \(\mathbb{Z}\) is often used to represent the set of integers.