這樣為什么不對呀？
>>> sum = 0
>>> x = 0
>>> while True:
... sum = sum + 2^x
... x = x + 1
... if x > 19:
... break
...
>>> print(sum)
4
3 回答
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>>> sum = 0
>>> x = 0
>>> while True:
... sum = sum + 2^x
... x = x + 1
... if x > 19:
... break
...
>>> print(sum)
4
2016-05-23
舉報
2016-05-23
啊 應(yīng)該改為sum = sum + 2^x改為sum = sum + x ** x
**為乘方符合
2016-05-23
sum = sum + 2^x改為sum = sum + x * x
2016-05-23
是不是沒有乘方這個符號？