JavaFibonacciInput

import java.util.Scanner;

public class Fibonacci {

    public static void main(String[] args) {
        // Start of the View
        int n = 10;
        Scanner input = new Scanner(System.in);

        System.out.print("I will calculate Fibonacci numbers. Please, enter n: ");

        while(!input.hasNextInt()){
            String error = input.next();
            System.out.printf("\n %s is not a number. Please try again: ", error);
        }
        n = input.nextInt();
        input.close();
        // End of the view


        long fibonacci2 = 1, fibonacci1 = 1, fibonacci = 1;
        for (int i = 1; i < n; i++) {
            if(i != 1 && i != 2) {
                fibonacci =  fibonacci2 + fibonacci1;
                fibonacci2 = fibonacci1;
                fibonacci1 = fibonacci;
            }
            System.out.println("Fibonacci number at position " + i + " = " + fibonacci);
        }
    }
}