What Is Linear Linked List in Data Structure?


Larry Thompson

What Is Linear Linked List in Data Structure?

In data structure, a linear linked list is a type of data structure that represents a collection of elements called nodes. Each node contains two fields: data and a reference to the next node in the list. The last node in the list points to NULL, indicating the end of the list.

Advantages of Linear Linked List

Linear linked lists offer several advantages over other data structures:

  • Dynamic Size: Unlike arrays, linked lists can grow or shrink dynamically as elements are added or removed.
  • Efficient Insertion and Deletion: Inserting or deleting an element from a linked list requires only updating a few references, making these operations efficient.
  • Memory Utilization: Linked lists utilize memory efficiently as nodes can be scattered throughout memory rather than requiring contiguous blocks.

Types of Linear Linked Lists

There are several types of linear linked lists:

Singly Linked List

In a singly linked list, each node contains a reference to the next node in the list. Traversing this type of list is only possible in one direction – from the head (the first node) to the tail (the last node).

Doubly Linked List

A doubly linked list extends on the concept of a singly linked list by adding an additional reference field to each node. This new field allows traversal in both directions: forward and backward.

Circular Linked List

A circular linked list is similar to a singly or doubly linked list but with an additional property that makes its tail node point to the head node, making it a circular structure.

Operations on Linear Linked List

Several common operations can be performed on a linear linked list:

  • Insertion: Adding a new node at the beginning, middle, or end of the list.
  • Deletion: Removing a node from the list.
  • Traversal: Visiting each node in the list to perform operations or retrieve data.
  • Searching: Finding a specific element in the list.


A linear linked list is a fundamental data structure that allows efficient management and manipulation of data. Understanding its advantages and different types can help you choose the appropriate linked list for your specific requirements. With the ability to dynamically resize and efficient insertion and deletion operations, linked lists are powerful tools in computer science and programming.

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