#include<stdio.h>
#include<stdlib.h>
struct Node {
int data;
struct Node *next;
};
void display(struct Node *n)
{
while (n != NULL)
{
printf(" %d \n", n->data);
n = n->next;
}
}
int main()
{
struct Node* head = NULL;
struct Node* second = NULL;
struct Node* third = NULL;
// allocate 3 nodes in the heap
head = (struct Node*)malloc(sizeof(struct Node));
second = (struct Node*)malloc(sizeof(struct Node));
third = (struct Node*)malloc(sizeof(struct Node));
head->data = 100; //assign data in first node
head->next = second; // Link first node with the second node
// assign data to second node
second->data = 200;
// Link second node with the third node
second->next = third;
third->data = 300; //assign data to third node
third->next = NULL;
display(head);
return 0;
}
Output:
100
200
300
Java Program
public class LinkedList
{
Node head; // head of list
static class Node {
int data;
Node next;
Node(int d) { data = d; next=null; }
}
/* This function prints contents of the linked list starting from head */
public void display()
{
Node n = head;
while (n != null)
{
System.out.print(n.data+" \n");
n = n.next;
}
}
/* method to create a simple linked list with 3 nodes*/
public static void main(String[] args)
{
/* Start with the empty list. */
LinkedList list = new LinkedList();
list.head = new Node(100);
Node second = new Node(200);
Node third = new Node(300);
list.head.next = second; // Link first node with the second node
second.next = third; // Link first node with the second node
list.display();
}
}
Output:
100
200
300
Python Program
# Node class
class Node:
# Function to initialise the node object
def __init__(self, data):
self.data = data # Assign data
self.next = None # Initialize next as null
# Linked List class contains a Node object
class LinkedList:
# Function to initialize head
def __init__(self):
self.head = None
# This function prints contents of linked list
# starting from head
def display(self):
temp = self.head
while (temp):
print temp.data,
temp = temp.next
# Code execution starts here
if __name__=='__main__':
# Start with the empty list
list = LinkedList()
list.head = Node(100)
second = Node(200)
third = Node(300)
list.head.next = second; # Link first node with second
second.next = third; # Link second node with the third node
list.display()
Output:
100
200
300
PHP Program
<?php
class Node
{
public $data;
public $next;
public function __construct($item)
{
$this->data = $item;
$this->next = null;
}
}
class LinkList
{
public $head = null;
public $second=null;
public $third=null;
private static $count = 0;
public function Insert() {
$this->head = new Node(100);
$this->second=new Node(200);
$this->third=new Node(300);
$this->head->next=$this->second;
$this->second->next=$this->third;
}
public function PrintAsList()
{
$items = [];
$current = $this->head;
while($current != null) {
array_push($items, $current->data);
$current = $current->next;
}
$str = '';
foreach($items as $item)
{
$str .= $item . ' ';
}
echo $str;
echo PHP_EOL;
}
}
$ll = new LinkList();
$ll->Insert();
$ll->PrintAsList();
echo PHP_EOL;
?>
Output:
100
200
300
Explanation
Linked List is a type of data structure in which information is stored in the form of a node which consists of data and address of next node. In a linked list, the node represents a single element.
Pictorial representation of a node:-
Representation of a node programmatically:-
C
struct Node
{
int data;
struct Node *next;
};
Java
class Node
{ int data;
Node next;
// Constructor to create a new node
// Next is by default initialized as null
Node(int d) {data = d;}
}
Python
classNode:
# Function to initialize the node object
def__init__(self, data):
self.data =data # Assign data
self.next=None # Initialize
# next as null
Php
class Node
{ public $data;
public $next;
public function __construct($item) {
$this->data = $item;
$this->next = null; }
}
By using the above syntax of creating a node in each language. A linked list is created by creating each node object and giving some value to the data section of the node and linking to the next node by using the next pointer.
Steps to create a linked list by using node:-
1. Firstly we will create an object of the node and initialize them. Each object represents the single node.
C
struct Node* head = NULL;
struct Node* second = NULL;
head = (struct Node*)malloc(sizeof(struct Node));
second = (struct Node*)malloc(sizeof(struct Node));
third = (struct Node*)malloc(sizeof(struct Node));
Java
Node second = new Node(200);
Node third = new Node(300);
Python
second = Node(200)
third = Node(300)
Php
public$head = null;
public$second=null;
public$third=null;
$this->head = new Node(100);
$this->second=new Node(200);
$this->third=new Node(300);
2. Finally, link nodes to each other. If there is no any next node to link, Next variable of node class will be initialized as null;
C
head->data = 100; //assign data in first node
head->next = second; // Link first node with the second node
Java
list.head.next = second; // Link first node with the second node
second.next = third; // Link first node with the second node
Python
list.head.next = second; # Link first node with second
second.next = third; # Link second node with the third node
C Program
Output:
Java Program
Output:
Python Program
Output:
PHP Program
Output:
Explanation
Linked List is a type of data structure in which information is stored in the form of a node which consists of data and address of next node. In a linked list, the node represents a single element.
Pictorial representation of a node:-
Representation of a node programmatically:-
C
Java
Python
Php
By using the above syntax of creating a node in each language. A linked list is created by creating each node object and giving some value to the data section of the node and linking to the next node by using the next pointer.
Steps to create a linked list by using node:-
1. Firstly we will create an object of the node and initialize them. Each object represents the single node.
C
struct Node* head = NULL;
struct Node* second = NULL;
head = (struct Node*)malloc(sizeof(struct Node));
second = (struct Node*)malloc(sizeof(struct Node));
third = (struct Node*)malloc(sizeof(struct Node));
Java
Node second = new Node(200);
Node third = new Node(300);
Python
second = Node(200)
third = Node(300)
Php
public $head = null;
public $second=null;
public $third=null;
$this->head = new Node(100);
$this->second=new Node(200);
$this->third=new Node(300);
2. Finally, link nodes to each other. If there is no any next node to link, Next variable of node class will be initialized as null;
C
head->data = 100; //assign data in first node
head->next = second; // Link first node with the second node
Java
list.head.next = second; // Link first node with the second node
second.next = third; // Link first node with the second node
Python
list.head.next = second; # Link first node with second
second.next = third; # Link second node with the third node
Php
$this->head->next=$this->second;
$this->second->next=$this->third;
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