用java求和f(n)=i-1/2+1/3.......+1/n的和 循环实现

Question

public class lianxi01 {
public static void main(String[] args) {
Scanner in=new Scanner(System.in);
int i;
int n=in.nextInt();
double result=0.0;
for(i=1;i<=n;i++){
if(i%2==0){
System.out.println(-i);
}
else if(i%2!=0){
System.out.println(i);

            }
     result=1+(1/i);

    }




}
}

Answer 1

 public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double i;
        int n = in.nextInt();
        double result = 0.0;
        int j = -1;
        for (i = 1; i <= n; i++) {
            result += (1 / i) * Math.pow(j, i + 1);
        }
        System.out.println(result);
    }