/*
 * Calculate the sum of the series 1/1+1/2+1/3+...+1/n 
 * Suggested exercises:
 * - Change the while-loop to do-loop or for-loop.
 * - Use an outer loop (nested loops) for n=1,2,4,8,...,2^m to print a table of n and sum
 * - Use a conditional print (i % 100 == 0) instead of nested loops to print the table (compare efficiency).
 * - Use powers of 2 in the conditional print (Math.log(i)/Math.log(2) % 2 == 0).
 * - Find the first n for which sum >= 10.
 * - Modify the series to 1/(i*i) and try the previous item (convergence experiments).
 */

import java.util.Scanner;

class Series 
{
    public static void main (String[] args) 
    {
        Scanner scan = new Scanner(System.in);
        System.out.print ("Type the number of terms in the series: ");
        int n = scan.nextInt();
        int i;
        double sum;
        
        i = 1;
        sum = 0;
        while (i<=n) {
            sum = sum + 1/(double)i;
            i++;
        } 
        System.out.println(n+"\t"+sum);
   }
}