1!+2!+3!+…+10!的和

public class Test {
    public static void main(String[] args) {
        /*
        输出1！+2！+***+10！的和
         */
        int sum=0;
        int n=1;
        for (int i = 1; i <10 ; i++) {
            for (int j=1;j<=i;j++){
                n=n*j;
            }
            sum+=n;
            n=1;
        }
        System.out.println("sum="+sum);

    }
}

public class Test2 {
    public static void main(String[] args) {
        int sum = 0, fact=1, n;
        for (n = 1; n <= 10; n++) {
            fact*=n;
            sum+=fact;
        }
        System.out.println("sum=" + sum);
    }
}