编写Python的一段程序

Question

计算1!+..+n！的值。函数或函数调用必须
"def f(i):
ifi==0:
sum=1
else:
sum=i*f(i-1)
return sum
n=eval(input("input n(n>=2):
print(f(n))

Answer 1

这样写。

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