def fact(n):
'''
Calculate 1*2*...*n
>>> fact(1)
1
>>> fact(10)
3628800
>>> fact(-1) #根据输出提示/错误提示来写
Traceback (most recent call last):
...
ValueError
if n < 1:
raise ValueError()
if n == 1:
return 1
else:
return n * fact(n - 1)
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landingguymmm
def fact(n):
'''
Calculate 1*2*...*n
>>> fact(1)
1
>>> fact(10)
3628800
>>> fact(-1) #根据输出提示/错误提示来写
Traceback (most recent call last):
...
ValueError
'''
if n < 1:
raise ValueError()
if n == 1:
return 1
else:
return n * fact(n - 1)