有没有其他方法来计算1!+2!+...+n!的结果？

可以使用循环来计算1!+2!+...+n!的结果。具体方法是，使用一个循环从1到n，每次将当前数的阶乘加到结果中。代码如下所示：

# Python代码
n = 5
result = 0
factorial = 1
for i in range(1, n+1):
    factorial *= i
    result += factorial
print(result)

// Java代码
int n = 5;
int result = 0;
int factorial = 1;
for (int i = 1; i <= n; i++) {
    factorial *= i;
    result += factorial;
}
System.out.println(result);

// C++代码
#include <iostream>
using namespace std;

int main() {
    int n = 5;
    int result = 0;
    int factorial = 1;
    for (int i = 1; i <= n; i++) {
        factorial *= i;
        result += factorial;
    }
    cout << result << endl;
    return 0;
}