Hmm...

I'm trying program to calculate sequence of factorial numbers.
ex) if n = 5
5! + 4! + 3! + 2! + 1!

import java.util.Scanner;
public class practices {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Give n: ");
int n = input.nextInt();

double sum = 0.0;
int j = n-1;
do {
double fact = n;
for (int i = (n - 1); i > 0; i--) {
fact *= i;
}
sum += fact;
j--;
} while (j > 0);
System.out.println(sum);
}
}

This is what I have so far... Do you know what's wrong with the code?