What set of numbers does 100 belong to?

The number 100 belongs to several sets of numbers, including the natural numbers (positive integers), whole numbers (non-negative integers), integers (both positive and negative whole numbers), rational numbers (can be expressed as a fraction of two integers), and real numbers (including both rational and Irrational Numbers). Additionally, it is a perfect square, as it can be expressed as 10 squared (10 x 10).