What is a linked list?

A linked list is defined as a data structure consisting of nodes that contain data and pointers. Each node in a linked list typically has two main components: the data part, which stores the actual value, and the pointer part, which references the next node in the sequence. This structure allows for dynamic memory allocation, meaning that linked lists can grow and shrink in size as elements are added or removed, unlike static arrays which have a fixed size.

In a linked list, nodes are not stored in contiguous memory locations, which is a key feature that distinguishes them from arrays. This non-contiguous arrangement allows linked lists to efficiently insert and delete nodes without the need for shifting elements, as would be required in an array.

The ability to traverse the data in a linked list can be achieved in both sequential and random access through pointers. Overall, the link between nodes provides flexibility and efficiency, particularly in scenarios where the size of the list can change frequently.