Series 2 Addition

 package loops;

import java.util.Scanner;

public class SeriesSum2 {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int n = sc.nextInt();

float result = 0;

for(float i = 1; i <=n ; i++) {

if(i%2==0) {

result -= 1/i;

}else {

result += 1/i;

}

System.out.println(result);

}

}