RosettaCodeData/Task/Fibonacci-sequence/Rhovas/fibonacci-sequence-3.rhovas

func fibonacci(num: Integer): Integer {
    match {
        num >= 0: return positiveFibonacci(num);
        num.mod(2) != 0: return positiveFibonacci(-num);
        else: return -positiveFibonacci(-num);
    }
}