FibonacciNumber

import java.io.*;
public class FibonacciNumber {
	static BufferedReader keyboard=new BufferedReader(new InputStreamReader(System.in));
	public static void main(String args[])throws IOException
	{
		int firstFibNum;
		int secondFibNum;
		int nth;

		System.out.println("Enter the first Fibonacci number:");
		firstFibNum=Integer.parseInt(keyboard.readLine());
		System.out.println();

		System.out.println("Enter the second Fibonacci number:");
		secondFibNum=Integer.parseInt(keyboard.readLine());
		System.out.println();



		System.out.print("Enter the desired Fibonaccinumber:");
		nth=Integer.parseInt(keyboard.readLine());
		System.out.println();
		System.out.println("The Fibonacci number at position"+nth+"is:"+rFibNum(firstFibNum,secondFibNum,nth));

	}
	public static int rFibNum(int a ,int b,int n){
		if(n==1)
		return a;
		else if(n==2)
        return b;
        else
        return rFibNum(a,b,n-1)+rFibNum(a,b,n-2);		
	}
}