/*

references

​

explanation on how to find previous value in fibonacci sequence

https://www.geeksforgeeks.org/find-the-previous-fibonacci-number/#:~:text=Approach%3A%20The%20ratio%20of%20two,be%20the%20previous%20Fibonacci%20number.

​

​

*/

​

​

using System;

public class Program

{

    public static void Main()

    {

        fibonacci(3,5);

    }

    public static void fibonacci(int start, int length){

        if(start < 1 || length < 0){

            Console.WriteLine("values must be greater than 0");

        }else{

            // calculate fib previous value

            double a = start / ((1 + Math.Sqrt(5)) / 2.0);

            int previous = (int)Math.Round(a);

            int current = start;

            Console.WriteLine(current);

            while(length > 0){

                int temp = current + previous;

                previous = current;

                current = temp;

                Console.WriteLine(current);

                length --;

            }

        }

    }

}