- Trending Categories
- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies

- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who

# Java Program to Display Fibonacci Series

In this article, we will understand how to find even sum of Fibonacci series till number N. A Fibonacci series is sequence of numbers formed by the sum of its two previous integers. An even Fibonacci series is all the even numbers of the Fibonacci series.

Below is a demonstration of the same −

Fibonacci series generates the subsequent number by adding two previous numbers. Fibonacci series starts from two numbers − F0 & F1. The initial values of F0 & F1 can be taken 0, 1 or 1, 1 respectively.

Fn = Fn-1 + Fn-2

Hence, a Fibonacci series can look like this −

F8 = 0 1 1 2 3 5 8 13

or, this,

F8 = 1 1 2 3 5 8 13 21

**Input**

Suppose our input is −

The input : 15

**Output**

The desired output would be −

The fibonacci series till 15 terms:

## Algorithm

Step 1 - START Step 2 - Declare values namely Step 3 - Read the required values from the user/ define the values Step 4 - Use a for loop to iterate through the integers from 1 to N and assign the sum of consequent two numbers as the current Fibonacci number Step 5- Display the result Step 6- Stop

## Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in ourcoding ground tool .

import java.util.Scanner; public class Main { public static void main(String[] args) { int my_input , term_1, term_2, term_3; term_1 = 0; term_2 = 1; System.out.println("Required packages have been imported"); Scanner my_scanner = new Scanner(System.in); System.out.println("A reader object has been defined "); System.out.print("Enter the number : "); my_input = my_scanner.nextInt(); System.out.println("The fibonacci series till " + my_input + " terms:"); for (int i = 1; i <= my_input; ++i) { System.out.print(term_1 + " "); term_3 = term_1 + term_2; term_1 = term_2; term_2 = term_3; } } }

## Output

Required packages have been imported A reader object has been defined Enter the number : 15 The fibonacci series till 15 terms: 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377

## Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class Main { public static void main(String[] args) { int my_input , term_1, term_2, term_3; my_input = 15; term_1 = 0; term_2 = 1; System.out.println("The number are defined as " +my_input ); System.out.println("The fibonacci series till " + my_input + " terms:"); for (int i = 1; i <= my_input; ++i) { System.out.print(term_1 + " "); term_3 = term_1 + term_2; term_1 = term_2; term_2 = term_3; } } }

## Output

The number are defined as 15 The fibonacci series till 15 terms: 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377