Java Program to Compute Harmonic Series

Java Program to Compute Harmonic Series using while loop

This java program is used to compute the harmonic series output for the user input number using while loop.

import java.util.Scanner;	
import java.lang.*;

public class HarmonicSeries {

	public static void main(String args[]) {
	  Scanner in = new Scanner(System.in); 
	  System.out.println("Generates Harmonic Series");
	  System.out.println("---------------------------");
	  System.out.print("Enter Number: ");
	  int number = in.nextInt();
	  int temp = number;
	  double sum = 0;
	  while(temp > 0){
		  sum = sum+((double)1/(double)temp);
		  temp--;
	  }
	  System.out.println("Harmonic Series Output for Number '"+number+"': "+sum);

	}
 }

Output:

D:\Java_Programs>javac HarmonicSeries .java
D:\Java_Programs>java HarmonicSeries 
Generates Harmonic Series
---------------------------
Enter Number: 5
Harmonic Series Output for Number '5': 2.283333333333333

Java Program to Compute Harmonic Series using for loop

import java.util.Scanner;	
import java.lang.*;

public class HarmonicSeries {

	public static void main(String args[]) {
	  Scanner in = new Scanner(System.in); 
	  System.out.println("Generates Harmonic Series");
	  System.out.println("---------------------------");
	  System.out.print("Enter Number: ");
	  int number = in.nextInt(); 
	  double sum = 0;
	  for(int temp = number;temp > 0; temp--){
		  sum = sum+((double)1/(double)temp);	 
	  }
	  System.out.println("Harmonic Series Output for Number '"+number+"': "+sum);

	}
 }

Output:

D:\Java_Programs>javac HarmonicSeries .java
D:\Java_Programs>java HarmonicSeries 
Generates Harmonic Series
---------------------------
Enter Number: 5
Harmonic Series Output for Number '5': 2.283333333333333

Java Program to Print Harmonic Series using for loop

This java program is used to print the harmonic series for the given number as user input.

import java.util.Scanner;	
import java.lang.*;

public class HarmonicSeries {

	public static void main(String args[]) {
	  Scanner in = new Scanner(System.in); 
	  System.out.println("Generates Harmonic Series");
	  System.out.println("---------------------------");
	  System.out.print("Enter Number: ");
	  int number = in.nextInt(); 
	  String strSeries = "1";
	  for(int temp = 2;temp <= number; temp++){
		  strSeries += "+(1/"+temp+")";	 
	  }
	  System.out.println("Harmonic Series:");
	  System.out.println(strSeries);
	}
 }

Output:

D:\Java_Programs>javac HarmonicSeries.java
D:\Java_Programs>java HarmonicSeries 
Generates Harmonic Series
---------------------------
Enter Number: 5
Harmonic Series:
1+(1/2)+(1/3)+(1/4)+(1/5)

Java Program to Print Harmonic Series using while loop

import java.util.Scanner;	
import java.lang.*;

public class HarmonicSeries {

	public static void main(String args[]) {
	  Scanner in = new Scanner(System.in); 
	  System.out.println("Generates Harmonic Series");
	  System.out.println("---------------------------");
	  System.out.print("Enter Number: ");
	  int number = in.nextInt(); 
	  String strSeries = "1";
	  int temp = 2;
	  while (temp <= number){
		  strSeries += "+(1/"+temp+")";	 
		  temp++;
	  }
	  System.out.println("Harmonic Series:");
	  System.out.println(strSeries);
	}
 }

Output:

D:\Java_Programs>javac HarmonicSeries .java
D:\Java_Programs>java HarmonicSeries 
Generates Harmonic Series
---------------------------
Enter Number: 5
Harmonic Series:
1+(1/2)+(1/3)+(1/4)+(1/5)

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