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.*/