编辑代码

public class Test{
    public static void main(String[] args){
        int sum = 0;
        for(int i = 1;i<=7;i++)
        sum +=factorial(i);
        System.out.println(sum);
    }
    public static int factorial(int num){
        int result = 1;
        for(int i =1;i<=num;i++){
            result *= i;
        }
        return result;
    }
}