# What is a real number, a whole number, an integer, a rational number, and an irrational number?

Mar 11, 2018

Rational numbers come in 3 different forms; integers, fractions and terminating or recurring decimals such as $\frac{1}{3}$.
Irrational numbers are quite 'messy'. They can't be written as fractions, they are never-ending, non-repeating decimals. An example of this is the value of π.
A whole number can be called an integer and is either a positive or negative number, or zero. An example of this is $0$, $1$ and $- 365$.