why 0! = 1. Idk it seems counterintuitive.

Question

Title

In: Mathematics

Answer 1

5! = 120

(now divide by five)

4! = 24

(now divide by four)

3! = 6

(now divide by three)

2! = 2

(now divide by two)

1! = 1

(now divide by one)

0! = 1

This is by no means rigorous, but it helps with intuition.