Question

what does the exclamation means in n!

Answer 1

n! = n (n - 1) (n - 2) (n - 3) ------1

So for example

5! = 5 x 4 x 3 x 2 x 1
4! = 4 x 3 x 2 x 1

Answer 2

ok Thanks Alot :)

Answer 3

No Problem :)