FACTORIAL(1)                General Commands Manual               FACTORIAL(1)

NNAAMMEE
     ffaaccttoorriiaall - factorial sequence

DDEESSCCRRIIPPTTIIOONN
     9! = 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 = 362880
     8! = 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 = 40320
     7! = 7 * 6 * 5 * 4 * 3 * 2 * 1 = 5040
     6! = 6 * 5 * 4 * 3 * 2 * 1 = 720
     5! = 5 * 4 * 3 * 2 * 1 = 120
     4! = 4 * 3 * 2 * 1 = 24
     3! = 3 * 2 * 1 = 6
     2! = 2 * 1 = 2
     1! = 1
     0! = 1

OpenBSD                          July 4, 2017                          OpenBSD