A tree data structure is very similar to a linked list. Where linked lists are linear (meaning we have each node in the collection pointing to a next node in a fixed sequence), a tree data structure is non-linear. This means we can have each node potentially pointing to one or more nodes. Think of a trees as a way to order things hierarchically. Example are, graphical representations of data (like an organizational charts), files in a file system or even sorted collections of data. When working with trees, order of the elements is not important (if it is, you can store your collection in a linked list, stack, queue, etc). Lets take a look at an example of an organizational chart ( a type of tree structure showing hierarchical data ). Read More