python计算阶乘和(1!+2!+3!+...+n!) python计算阶乘和的方法(1!+2!+3!+...+n!)

n = int(input())
jie = 1
sum = 0
i = 1
while n >= i:
  jie = jie * i
  sum = sum + jie
  i = i + 1
print(sum)

def jie(n):
  if n == 1:
    return 1
  else:
    return n*jie(n-1)
n = int(input())
sum = 0
if n < 1 or n > 40:
  print("请重新输入数据")
else:
  for i in range(1,n+1):
    sum = sum + jie(i)
  print(sum)