Linked List | Set 2 (Inserting a node)We have introduced Linked Lists in the previous post. We also created a simple linked list with 3 nodes and discussed linked list traversal. Show C++
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In this post, methods to insert a new node in linked list are discussed. A node can be added in three ways Inserting a node at the beginning of a linked listThe new node will be added at the beginning of a linked list. ExampleAssume that the linked list has elements: 20 30 40 NULL If we insert 100, it will be added at the beginning of a linked list. After insertion, the new linked list will be 100 20 30 40 NULL Problem solution in Python programming.#!/bin/python3 import math import os import random import re import sys class SinglyLinkedListNode: def __init__(self, node_data): self.data = node_data self.next = None class SinglyLinkedList: def __init__(self): self.head = None self.tail = None def print_singly_linked_list(node, sep, fptr): while node: fptr.write(str(node.data)) node = node.next if node: fptr.write(sep) def insertNodeAtHead(llist, data): # Write your code here node = SinglyLinkedListNode(data) if llist: node.next = llist return node if __name__ == '__main__': fptr = open(os.environ['OUTPUT_PATH'], 'w') llist_count = int(input()) llist = SinglyLinkedList() for _ in range(llist_count): llist_item = int(input()) llist_head = insertNodeAtHead(llist.head, llist_item) llist.head = llist_head print_singly_linked_list(llist.head, '\n', fptr) fptr.write('\n') fptr.close()Linked List Operations: Traverse, Insert and DeleteIn this tutorial, you will learn different operations on a linked list. Also, you will find implementation of linked list operations in C/C++, Python and Java. There are various linked list operations that allow us to perform different actions on linked lists. For example, the insertion operation adds a new element to the linked list. Here's a list of basic linked list operations that we will cover in this article.
Before you learn about linked list operations in detail, make sure to know about Linked List first. Things to Remember about Linked List
In all of the examples, we will assume that the linked list has three nodes 1 --->2 --->3 with node structure as below: struct node { int data; struct node *next; }; |