ReadDataAtIndexLinkedList

//: Get Node at Index
extension LinkedList { 
    func getNode(atPosition position: Int) -> Node? {
        guard position > 0 else {
            return nil
        }
        
        var counter = 1
        var current = head
        
        while current != nil && counter <= position {     
            if counter == position {                   
               return current }
             current = current?.next
             counter += 1
         }
         return nil     
      }
}