Introduction - If you have any usage issues, please Google them yourself
In general, any positive integer greater than 0, the factorial n equal to n and (n-1) of the factorial of the plot, that is, n! = N (n-1)!. With (n-1)! Express the value of n! The value of its expression is a recursive call, because the value of a factorial is a factorial of the value-based. This procedure is used for recursive calls the factorial n is the number of procedures