factorial(-1) NaN # find the factorial of 0 > factorial(0) 1 # find the factorial of 1 > factorial(1) 1 # find the factorial of 7 > factorial(7) 5040 # find the factorial for vector of each elements 2, 3, 4 > factorial(c(2,3,4)) 2 6 24 1. The function accepts the number as an argument. As n! Factorial from 4 is considered as the 4 × 3 × 2 × 1, that is 24. is: 1 * 2 * 3 * … (n-1) * n Because the exclamation mark is the symbol for a factorial you might expect it to be recognized by Excel, but you will get an error message if you try to enter a formula such as =5!. may sound ordinary at the first glance because writing a code for factorial calculation is not at all a tough job but storing such a large number definitely requires some extra effort. 1-Input and output for single number factorial. … In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, 5! 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