package aspectjhw;

/** A demo for AspectJ homework.
 * @author Gary T. Leavens
 */
public class Fibonacci {
	
	/** No instances. */
	private Fibonacci() {}
	
	/** Compute the nth fibonacci number. */
	//@ requires n >= 0;
	public static long fib(long n) {
		if (n < 2) {
			return n;
		} else {
			return fib(n - 1) + fib(n - 2);
		}
	}
}