Program for

import java.util.*;
public class Ch2Q38
{public static void main(String[] args)
    {int n;
     double sum = 0;
     Scanner kbd = new Scanner(System.in);
     System.out.print("Enter no of terms: ");
     n = kbd.nextInt();
     int sign = 1;
     for(int i = 1; i <= n; i++)
      {sum += sign*1.0/i;
      sign = -sign;
      }
     System.out.println("Sum = "+ sum);
    }
}