2/1+3/2+4/3+…+(n+1)/n

import java.util.*;
public class Geee
{    
    public static void main(String[] args){
     Scanner s=new Scanner(System.in);
     System.out.println("please input");
      int x=s.nextInt();
      double sum=0;
      for (double i=1;i<=x ;i++ )
      {sum=sum+((i+1)/i);
      
System.out.println(sum);}


    }
    

    
}