When people type "!" . What would it looks like on paper . e.g. 9!
Like how * = times
N! indicates that we take the product of all the positive integers up to, and including, N
For example
4! = 1 x 2 x 3 x 4 = 24
5! = 1 x 2 x 3 x 4 x 5 = 120
BTW....by definition.... 0! = 1
+73 
