Factorial of a number

Factorial of a non-negative number is the multiplication of all positive numbers that are smaller than are equal to n. Formula: n! = n*(n-1)\(n-2)*... 2\1 n=5 => 5*4*3*2*1 n=5 => 1*2*3*4*5 factorial of 5 is 120 0! = 1 Factorial using for loop: public...