Using Iteration

 public static int fibonacciLoop(int nthNumber) {
        //use loop
        int previouspreviousNumber, previousNumber = 0, currentNumber = 1;

        for (int i = 1; i < nthNumber ; i++) {

            previouspreviousNumber = previousNumber;

            previousNumber = currentNumber;

            currentNumber = previouspreviousNumber + previousNumber;

        }
        return currentNumber;
    }