JAVA ADD,SUM,MUL,DIV

class file_name{
      public static void main(String ar[]){
             int a=10,b=20;
             double c,d,e,f;
              c=a+b;
              d=a-b;
              e=a/b;
              f=a*b;
             System.out.println(c); 
             System.out.println(d);
             System.out.println(e);
             System.out.println(f);  
     }
}

OutPut
----------------------
30
10
2
200