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