Java Program To Print Harmonic-Series Value

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class HarmonicSeries {
public static void main(String args[]) throws Exception {
BufferedReader keyboard = new BufferedReader(new InputStreamReader(
System.in));
System.out.println("Enter Number :");
int num = Integer.parseInt(keyboard.readLine());

double result = 0.0;
while (num > 0) {
result = result + (double) 1 / num;
num--;
}
System.out.println("Output of Harmonic Series is " + result);
}
}

OUTPUT:

                  Enter Number :10

                  Output of Harmonic Series is 2.9289682539682538