public void addToEnd ()
    {
        Node anotherNode = new Node (currentDataValue);
        currentDataValue += 10;
        Node temp;

        if (isEmpty() == true)
        {
            head = anotherNode;
            length++;
        }
else
        {
            temp = head;
            while (temp.next != null)
            {
                temp = temp.next;
            }
            temp.next = anotherNode;
            length++;
        }
    }