﻿EXTERN FUNCTION Main(args[])
    VARIABLE result = Fibonacci(9)
    System.Console.WriteLine("Fib 9 = " + result)
    RETURN result
END FUNCTION

FUNCTION Fibonacci(n)
    IF n <= 1 THEN
        RETURN n
    ELSE
        RETURN Fibonacci(n - 1) + Fibonacci(n - 2)
    END IF
END FUNCTION