Algorithm of Highest Common Factor (HCF)

This is algorithm for  HCF

public static int hcf(int a, int b)
        {
                if (b == 0)              // 1 Assignment
                        return a;
                else
                        return hcf(b, a % b);
        }

        public static int hcf(int a, int b, int c)
     {

                return hcf(hcf(a, b), c);       // 1 Assignment

        }