https://www.mathsisfun.com/numbers/real-numbers.html https://www.mathsisfun.com/numbers/real-numbers.html Note that 'real numbers' include 'whole numbers' as a

https://www.mathsisfun.com/numbers/real-numbers.html https://www.mathsisfun.com/numbers/real-numbers.html Note that 'real numbers' include 'whole numbers' as a sub-set.