The set of positive and negative numbers whose absolute value is a whole number.

### Symbol

- The set of integers is denoted by the letter \(\mathbb{Z}\).
- \(\mathbb{Z}\) = {…, –4, –3, –2, –1, 0, 1, 2, 3, 4, …}.

### Educational note

The symbol \(\mathbb{Z}\) is the first letter of the German word *zahl* meaning “number”.