# _*_ encoding:utf-8 _*_
import numpy as np
import pandas as pd
from numpy import *
def Recursive(n): #Recursive递归
n = int(n)
sum = 0
chengji = 1
for i in range(1,n+1):
chengji = chengji*i
sum += chengji
print('%d! 的和是 %d ' % (n, sum))
if __name__ == '__main__':
print("这个程序是计算n阶阶乘和")
num = input("请输入阶数:")
Recursive(num)
输出: