recursive fibonacci

class Main {
    public static void main(String[] args) {
       System.out.println(fib(6));
    }
    public static int fib(int a){
        if(a <=0){
            return 0;
        }
        else if (a <= 1){
            return 1;
        }
        return fib(a-1) + fib(a-2);
    }
}