Types of Numbers

Types of numbers:

Natural Numbers $\mathbb{N}$ : $1, 2, 3, 4, \dots$
Integers $\mathbb{Z}$ - Natural numbers and 0 and negative of natural numbers: $\ldots -1, 0, 1 \dots$
Rational Numbers $\mathbb{Q}$ - $\frac{ m}{n}$ , where $m$ and $n$ are integers: $3, \frac{1}{2},$ etc.
Real Numbers $\mathbb{R}$ - Any number that can appear on the number line: $-0.123, \frac{98}{7},$ etc.
Irrational Numbers - any real number that is not rational: $\pi, \sqrt{2},$ etc.