sealfreeze.js.EXPECTED revision 2:da1e581c933b 
1sealed? false
2frozen? false
3sealed? true
4deleted num? false
5num = 2.718281828459045
6assign PI to num
7num = 3.141592653589793
8frozen? true
9assign 1729 to num
10num = 3.141592653589793
11