Program to illustrate Harmonic series : 1 + 1/2 + 1/3 + ......+ 1/n

Program to illustrate Harmonic series : 1 + 1/2 + 1/3 + ......+ 1/n

import java.io.DataInputStream;   // to load DataInputStream class


class P21
{
    public static void main(String args[])
    {
        int n;
        float temp,sum=0.0F;

        // creating object of class DataInputStream.
                DataInputStream in = new DataInputStream(System.in);
       
        System.out.println("Harmonic series : 1 + 1/2 + 1/3 + ......+ 1/n \n ");

            try
           {

        System.out.print(" Enter a number  : ");
        n = Integer.parseInt(in.readLine());
       
        for(int i=0;i<n;i++)           
            sum= sum + (float)1/(i+1);
       
        System.out.println("\nHarmonic series for "+n+" is : "+sum);

        }
        catch(Exception e) {  System.out.println("I/O Error");   }
    }
}

/* This program might give some Note at compile time, ignore it and go ahead.*/