Factorial of 0
The factorial of 0 is 1. The factorial of a number explains how many ways the numbers can be arranged. For example, 5! is 120. It is the multiplication of the numbers below 5, and below 5, that is, 5 × 4 × 3 × 2 × 1. However, since there is only one way 0 can be arranged, therefore, the factorial of 0 is 1. 0! is 1, and 1! is also 1.
Is 0 a Natural Number?
0 is not a Natural number. Instead, Zero is a whole numbers, not natural number. The natural number start with 0 and end up to infinity. It is a positive integer that range from 1 to infinity(∞). These numbers may be counted and are commonly used in calculations. Natural numbers are commonly denoted as “N”. We use numbers daily. They are commonly cited as numerals. We can’t count things, dates, times, money, etc., without numbers.