Cacher is the code snippet organizer for pro developers

Python强类型：不同类型不能够进行运算。

>>> 3+6
9

>>> "3"+6
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Can't convert 'int' object to str implicitly

>>> "3"+"6"
'36'

>>> "6"-"3"
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for -: 'str' and 'str'

------------------------------------------------------------
Javascript弱类型：不同类型可以进行运算。
3+6
9

"3"+6
"36"

"3"+"6"
"36"

"6"-"3"
3