public static void main(String[] args) {
         summ(10,15);
        System.out.println(d);
        mult(10,15);
        System.out.println(x);

         public static void summ(int a,b) {
            int d=a+b;
        }
         public static void mult(int a,b) {
           int x=a*b;
        }
    }