1 int method 2
   2 double method 2
   3 string method 2
   4 int method 3: 10
   5 double method 3: 10.0
   6 double method 3: 10.2
   7 double method 3: NaN
   8 int method 4: 10
   9 double method 4: 10.2
  10 double method 4: NaN