编程求表达式 1!+2!+3!+......+n! 的值python

可以使用循环来计算阶乘和，具体代码如下：

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n-1)

def sum_of_factorials(n):
    sum = 0
    for i in range(1, n+1):
        sum += factorial(i)
    return sum

n = int(input("请输入n的值："))
print("1!+2!+3!+......+n!的值为：", sum_of_factorials(n))