求输入数字的阶乘及加和 #s=1!+2!+3!+…..+n!

2024-08-28 08:16:37

#s=1!+2!+3!+…..+n!

from functools import reduce

def factorial(n):

    result=0

    for i in range(1,n+1):

        result+=reduce(lambda x,y:x*y,list(range(1,i+1)))

        print('%s的阶乘加和结果为：%s'%(i,reduce(lambda x,y:x*y,list(range(1,i+1)))))

    return result

print('1到%s的阶乘加和结果是：%s'%(5,factorial(5)))

#方法2
def factorial(n):

    result=0

    for i in range(1,n+1):

        rr=1

        for j in range(1,i+1):

            rr*=j

        result+=rr

        print('%s的阶乘加和结果为：%s'%(i,rr))

    return result

print('1到%s的阶乘加和结果是：%s'%(5,factorial(5)))

print('1到%s的阶乘加和结果是：%s'%(4,factorial(4)))

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