Java program to print Fibonacci series

In this example I’m going to show you how to write a program to print Fibonacci series in Java.

The same Fibonacci programme is written in other languages such as C and JavaScript, search “fibonacci” in the search field to find those. Soon I will be writing in all other programming languages too.

If you already don’t have knowledge about Fibonacci, here is a simple explanation,

0, 1, 1, 2, 3, 5, 8…

0,1 -> 0 +1 =1 ( 1 is the next number)
0,1,2 -> 1+1 = 2 (2 is the next number)
0,1,2 -> 1+2 = 3
0,1,2,3 -> 2+3 = 5

So basically Fibonacci series is finding the next number by adding the previous two numbers.

Here is the Java Program to print Fibonacci series:

import java.util.*;
public class fibonacci {

    public static void main(String[] args) {
      //define the variable
      int limit, next_num, first_num = 0, second_num = 1;
      Scanner in = new Scanner(System.in);
      
      System.out.print("Enter the limit: ");
      limit = in.nextInt();
      
      //check the input if the value is greater than 0
      if(limit > 0){
        System.out.println(first_num);
      }else{
        System.out.println("Value should be greater than 0");
      }
      //check if input is 1
      if(limit > 1){
        System.out.println(second_num);
      }
      
      //if the input is > 2 then do then print fibonacci
      while(limit > 2)
        {       
           //add the first value and second to get the next value
           next_num   = first_num + second_num;
           
           //assign second value to first
           //next value to second
           //to find the next series
           first_num  = second_num;
           second_num = next_num;
           
           //print the next value
           System.out.println(next_num);
           
           //decrement the limit by one 
           limit--;
        }
    }
    
}

The output of the program will be:

Enter the limit: 6
0
1
1
2
3
5

Keep learning, update your knowledge daily!