In mathematics, the factorial of integer n
is written as n!
. It is equal to the product of n and every integer preceding it. For example: 5! = 1 x 2 x 3 x 4 x 5 = 120
Your mission is simple: Write a function f
in class C
that takes an integer n
and returns the value of n!
as a string in full. For zero and all negative numbers, assume result of "1"
.
Your code must be at or under the par of 140 characters, whitespace included (compact your code into one line!). (Author's best: 125)