从键盘输入整数n(n<=10),求1!+2!+3!+.....+n!

以下是Python代码，用于计算1!+2!+3!+...+n!的和：

n = int(input("请输入一个整数n(n<=10): "))
sum = 0
factorial = 1
for i in range(1, n+1):
    factorial *= i
    sum += factorial
print(sum)