输出1!+2!+3!+......+n!

输出1!+2!+3!+......+n!
Time Limit: 1 Sec Memory Limit:128 MB Submit: 4346 Solved:3003

Description:
   输入一个正整数n。输出1!+2!+3!+…+n!的值。

Input:
   输入一个正整数n。

Output:
   输出1!+2!+3!+…+n!的值。

Sample Input:

4

Sample Output:

33

HINT

Source

public class JieChengJia {
    
    public static void main(String[] args) {
    
        Scanner sc = new Scanner(System.in);
           int n = sc.nextInt();
           int num=1;
           int ans=0;
        for (int i=1;i<=n;i++){
    
                num=num*i;
                ans+=num;
// System.out.print(num + " ");
        }
// System.out.println();
        System.out.print(ans);

    }
}