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Java program To Find The Nth Fibonacci Number

This code takes the value of N from user and displays the Nth number of the Fibonacci Series.

N is a variable which inputs a integer value using System.in.

To understand this example, you should have the knowledge of the following Java programming topics:

To find the Nth Fibonacci number

A java program to find the Nth Fibonacci number.

Java Code

import java.util.Scanner;

public class Fibonacci {
    public static void main(String[] args) {
        long n, term1=0, term2=1, i, fib=1 ;
        Scanner sc = new Scanner(System.in) ;
        System.out.print("Enter the value of n: ") ;
        n = sc.nextInt() ;
        if (n == 1) {
            fib = term1;
        }
        else if (n == 2) {
            fib = term2;
        }
        else {
            for (i = 3 ; i <= n ; i ++)
            {
                fib = term1 + term2;
                term1 = term2;
                term2 = fib;
            }
        }
        System.out.println("The Nth Fibonacci Number is " + fib) ;
        sc.close();
    }
}

Output 1

Enter the value of n: 69
The Nth Fibonacci Number is 72723460248141

Output 2

Enter the value of n: 12
The Nth Fibonacci Number is 89

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