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Day 7

Day 7: Introduction to Linked Lists

7/60 Days

Introduction to Linked Lists #

Welcome to Day 7 of our 60 Days of Coding Algorithm Challenge! Today, we’ll dive into the world of linked lists, a fundamental data structure in computer science.

What is a Linked List? #

A linked list is a linear data structure where elements are stored in nodes. Each node contains a data field and a reference (or link) to the next node in the sequence.

Unlike arrays, linked lists do not store elements in contiguous memory locations. Instead, the elements are linked using pointers.

Basic Structure of a Linked List #

A typical node in a linked list consists of two components:

  1. Data: The value or payload of the node
  2. Next: A reference to the next node in the sequence
1class Node:
2    def __init__(self, data):
3        self.data = data
4        self.next = None

Types of Linked Lists #

  1. Singly Linked List: Each node points to the next node in the sequence.
  2. Doubly Linked List: Each node has pointers to both the next and previous nodes.
  3. Circular Linked List: The last node points back to the first node, forming a circle.

Basic Operations on a Linked List #

  1. Insertion: Adding a new node to the list
  2. Deletion: …