Singly Linked Lists vs. Doubly Linked Lists

Let's see how the two renditions of the linked list structure fare against each other.

Which is Better? #

DLLs has a few advantages over SLLs

  • Doubly linked lists can be traversed in both directions, which makes them more compatible with complex algorithms.
  • Operations involving tail become much faster. Deletion at the tail is one such example.

These benefits entail the cost of extra memory:

  • Nodes in doubly linked lists require extra memory to store the previousElement pointer.

Lets’s look at the implementation of delete at the tail operation to see the real power of a DLL.

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