wap to find a factorial of a number

public class factorial

 {

    public static void main(String[] args) {

        int num = 10;

        long factorial = 1;

        for(int i = 1; i <= num; ++i)

        {

            // factorial = factorial * i;

            factorial *= i;

        }

        System.out.printf("Factorial of %d = %d", num, factorial);

    }

}