# 计算n!例如n=3(计算3*2*1=6),求10!
# 方法一:可以用python里面的reduce函数,reduce()函数会对参数序列中元素进行累积
# 1.用lambda函数
from functools import reduce
a = 10
b = reduce(lambda x,y:x*y, range(1,a+1))
print(b)
# 2.自定义一个函数
from functools import reduce
def chengfa(x,y):
return x*y
a = 10
b = reduce(chengfa,range(1,a+1))
print(b)
# 方法二:自己写个递归函数
def digui(n):
if n == 1:
return 1
else:
return n*digui(n-1)
a = 10
print(digui(a))
# 方法三:用for循环(不推荐)
a = 10
s = 1
for i in range(1,a+1):
s = s*i
print(s)
python笔试题—计算n的阶乘
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转载自blog.csdn.net/nickyff/article/details/104401580
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