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Circular Linked List | Set 1 (Introduction and Applications)

We have discussed singly and doubly linked lists in the following posts.

Table of Contents Show

• MCQs on Linked list with answers
• Circular Linked List | Set 1 (Introduction and Applications)
• Circular Singly Linked List | Insertion
• Circular Singly Linked List
• Circular Linked List MCQ Questions and Answers
• More Questions on Abstract Data Types (Data Structure)

Introduction to Linked List & Insertion
Doubly Linked List Introduction and Insertion

Circular linked list is a linked list where all nodes are connected to form a circle. There is no NULL at the end. A circular linked list can be a singly circular linked list or doubly circular linked list.

Advantages of Circular Linked Lists:
1) Any node can be a starting point. We can traverse the whole list by starting from any point. We just need to stop when the first visited node is visited again.

2) Useful for implementation of queue. Unlike this implementation, we don’t need to maintain two pointers for front and rear if we use circular linked list. We can maintain a pointer to the last inserted node and front can always be obtained as next of last.

3) Circular lists are useful in applications to repeatedly go around the list. For example, when multiple applications are running on a PC, it is common for the operating system to put the running applications on a list and then to cycle through them, giving each of them a slice of time to execute, and then making them wait while the CPU is given to another application. It is convenient for the operating system to use a circular list so that when it reaches the end of the list it can cycle around to the front of the list.

4) Circular Doubly Linked Lists are used for implementation of advanced data structures like Fibonacci Heap.

Next Posts :
Circular Linked List | Set 2 (Traversal)
Circular Singly Linked List | Insertion

Please write comments if you find any bug in above code/algorithm, or find other ways to solve the same problem

Article Tags :

Linked List

circular linked list

Practice Tags :

Linked List

circular linked list

Circular Singly Linked List | Insertion

We have discussed Singly and Circular Linked List in the following post:
Singly Linked List
Circular Linked List

Why Circular? In a singly linked list, for accessing any node of the linked list, we start traversing from the first node. If we are at any node in the middle of the list, then it is not possible to access nodes that precede the given node. This problem can be solved by slightly altering the structure of a singly linked list. In a singly linked list, the next part (pointer to next node) is NULL. If we utilize this link to point to the first node, then we can reach the preceding nodes. Refer to this for more advantages of circular linked lists.
The structure thus formed is a circular singly linked list and looks like this:

In this post, the implementation and insertion of a node in a Circular Linked List using a singly linked list are explained.

Implementation
To implement a circular singly linked list, we take an external pointer that points to the last node of the list. If we have a pointer last pointing to the last node, then last -> next will point to the first node.

The pointer last points to node Z and last -> next points to node P.

Why have we taken a pointer that points to the last node instead of the first node?
For the insertion of a node at the beginning, we need to traverse the whole list. Also, for insertion at the end, the whole list has to be traversed. If instead of start pointer, we take a pointer to the last node, then in both cases there won’t be any need to traverse the whole list. So insertion at the beginning or at the end takes constant time, irrespective of the length of the list.

Insertion
A node can be added in three ways:

• Insertion in an empty list
• Insertion at the beginning of the list
• Insertion at the end of the list
• Insertion in between the nodes

Insertion in an empty List
Initially, when the list is empty, the last pointer will be NULL.

After inserting node T,

After insertion, T is the last node, so the pointer last points to node T. And Node T is the first and the last node, so T points to itself.
Function to insert a node into an empty list,

C++

struct Node *addToEmpty(struct Node *last, int data) { // This function is only for empty list if (last != NULL) return last; // Creating a node dynamically. struct Node *temp = (struct Node*)malloc(sizeof(struct Node)); // Assigning the data. temp -> data = data; last = temp; // Note : list was empty. We link single node // to itself. temp -> next = last; return last; }

Java

static Node addToEmpty(Node last, int data) { // This function is only for empty list if (last != null) return last; // Creating a node dynamically. Node temp = new Node(); // Assigning the data. temp.data = data; last = temp; // Note : list was empty. We link single node // to itself. temp.next = last; return last; } // This code is contributed by gauravrajput1

Python3

# This function is only for empty list def addToEmpty(self, data): if (self.last != None): return self.last # Creating the newnode temp temp = Node(data) self.last = temp # Creating the link self.last.next = self.last return self.last # this code is contributed by shivanisinghss2110

C#

static Node addToEmpty(Node last, int data) { // This function is only for empty list if (last != null) return last; // Creating a node dynamically. Node temp = new Node(); // Assigning the data. temp.data = data; last = temp; // Note : list was empty. We link single node // to itself. temp.next = last; return last; } // This code contributed by umadevi9616

Javascript

<script> function addToEmpty(last , data) { // This function is only for empty list if (last != null) return last; // Creating a node dynamically. var temp = new Node(); // Assigning the data. temp.data = data; last = temp; // Note : list was empty. We link single node // to itself. temp.next = last; return last; } // This code contributed by umadevi9616 </script>

Insertion at the beginning of the list
To insert a node at the beginning of the list, follow these steps:
1. Create a node, say T.
2. Make T -> next = last -> next.
3. last -> next = T.

After insertion,

Function to insert nodes at the beginning of the list,

C++

struct Node *addBegin(struct Node *last, int data) { if (last == NULL) return addToEmpty(last, data); // Creating a node dynamically. struct Node *temp = (struct Node *)malloc(sizeof(struct Node)); // Assigning the data. temp -> data = data; // Adjusting the links. temp -> next = last -> next; last -> next = temp; return last; }

Java

static Node addBegin(Node last, int data) { if (last == null) return addToEmpty(last, data); // Creating a node dynamically Node temp = new Node(); // Assigning the data temp.data = data; // Adjusting the links temp.next = last.next; last.next = temp; return last; } // This code is contributed by rutvik_56

Python3

def addBegin(self, data): if (self.last == None): return self.addToEmpty(data) temp = Node(data) temp.next = self.last.next self.last.next = temp return self.last # this code is contributed by shivanisinghss2110

C#

static Node addBegin(Node last, int data) { if (last == null) return addToEmpty(last, data); // Creating a node dynamically Node temp = new Node(); // Assigning the data temp.data = data; // Adjusting the links temp.next = last.next; last.next = temp; return last; } // This code is contributed by Pratham76

Javascript

<script> function addBegin(last , data) { if (last == null) return addToEmpty(last, data); // Creating a node dynamically. var temp = new Node(); // Assigning the data. temp.data = data; // Adjusting the links. temp.next = last.next; last.next = temp; return last; } // This code contributed by Shivani </script>

Insertion at the end of the list
To insert a node at the end of the list, follow these steps:
1. Create a node, say T.
2. Make T -> next = last -> next;
3. last -> next = T.
4. last = T.

After insertion,

Function to insert a node at the end of the List

C++

struct Node *addEnd(struct Node *last, int data) { if (last == NULL) return addToEmpty(last, data); // Creating a node dynamically. struct Node *temp = (struct Node *)malloc(sizeof(struct Node)); // Assigning the data. temp -> data = data; // Adjusting the links. temp -> next = last -> next; last -> next = temp; last = temp; return last; }

Java

static Node addEnd(Node last, int data) { if (last == null) return addToEmpty(last, data); // Creating a node dynamically. Node temp = new Node(); // Assigning the data. temp.data = data; // Adjusting the links. temp.next = last.next; last.next = temp; last = temp; return last; } // This code is contributed by shivanisinghss2110

Python3

def addEnd(self, data): if (self.last == None): return self.addToEmpty(data) # Assigning the data. temp = Node(data) # Adjusting the links. temp.next = self.last.next self.last.next = temp self.last = temp return self.last # This code is contributed by shivanisinghss2110

C#

static Node addEnd(Node last, int data) { if (last == null) return addToEmpty(last, data); // Creating a node dynamically. Node temp = new Node(); // Assigning the data. temp.data = data; // Adjusting the links. temp.next = last.next; last.next = temp; last = temp; return last; } // This code is contributed by shivanisinghss2110

Javascript

<script> function addEnd(last, data) { if (last == null) return addToEmpty(last, data); var temp = new Node(); temp.data = data; temp.next = last.next; last.next = temp; last = temp; return last; } // this code is contributed by shivanisinghss2110 </script>

Insertion in between the nodes
To insert a node in between the two nodes, follow these steps:
1. Create a node, say T.
2. Search for the node after which T needs to be inserted, say that node is P.
3. Make T -> next = P -> next;
4. P -> next = T.
Suppose 12 needs to be inserted after the node has the value 10,

After searching and insertion,

Function to insert a node at the end of the List,

C++

struct Node *addAfter(struct Node *last, int data, int item) { if (last == NULL) return NULL; struct Node *temp, *p; p = last -> next; // Searching the item. do { if (p ->data == item) { // Creating a node dynamically. temp = (struct Node *)malloc(sizeof(struct Node)); // Assigning the data. temp -> data = data; // Adjusting the links. temp -> next = p -> next; // Adding newly allocated node after p. p -> next = temp; // Checking for the last node. if (p == last) last = temp; return last; } p = p -> next; } while (p != last -> next); cout << item << " not present in the list." << endl; return last; }

Java

static Node addAfter(Node last, int data, int item) { if (last == null) return null; Node temp, p; p = last.next; do { if (p.data == item) { temp = new Node(); temp.data = data; temp.next = p.next; p.next = temp; if (p == last) last = temp; return last; } p = p.next; } while(p != last.next); System.out.println(item + " not present in the list."); return last; } // This code is contributed by shivanisinghss2110

Python3

def addAfter(self, data, item): if (self.last == None): return None temp = Node(data) p = self.last.next while p: if (p.data == item): temp.next = p.next p.next = temp if (p == self.last): self.last = temp return self.last else: return self.last p = p.next if (p == self.last.next): print(item, "not present in the list") break # This code is contributed by shivanisinghss2110

C#

static Node addAfter(Node last, int data, int item) { if (last == null) return null; Node temp, p; p = last.next; do { if (p.data == item) { temp = new Node(); temp.data = data; temp.next = p.next; p.next = temp; if (p == last) last = temp; return last; } p = p.next; } while(p != last.next); Console.WriteLine(item + " not present in the list."); return last; } // This code is contributed by shivanisinghss2110

Javascript

<script> function addAfter(last, data, item) { if (last == null) return null; var temp, p; p = last.next; do { if (p.data == item) { temp = new Node(); temp.data = data; temp.next = p.next; p.next = temp; if (p == last) last = temp; return last; } p = p.next; } while (p != last.next); document.write(item + " not present in the list. <br>"); return last; } // This code is contributed by shivanisinghss2110 </script>

The following is a complete program that uses all of the above methods to create a circular singly linked list.

C++

#include<bits/stdc++.h> using namespace std; struct Node { int data; struct Node *next; }; struct Node *addToEmpty(struct Node *last, int data) { // This function is only for empty list if (last != NULL) return last; // Creating a node dynamically. struct Node *temp = (struct Node*)malloc(sizeof(struct Node)); // Assigning the data. temp -> data = data; last = temp; // Creating the link. last -> next = last; return last; } struct Node *addBegin(struct Node *last, int data) { if (last == NULL) return addToEmpty(last, data); struct Node *temp = (struct Node *)malloc(sizeof(struct Node)); temp -> data = data; temp -> next = last -> next; last -> next = temp; return last; } struct Node *addEnd(struct Node *last, int data) { if (last == NULL) return addToEmpty(last, data); struct Node *temp = (struct Node *)malloc(sizeof(struct Node)); temp -> data = data; temp -> next = last -> next; last -> next = temp; last = temp; return last; } struct Node *addAfter(struct Node *last, int data, int item) { if (last == NULL) return NULL; struct Node *temp, *p; p = last -> next; do { if (p ->data == item) { temp = (struct Node *)malloc(sizeof(struct Node)); temp -> data = data; temp -> next = p -> next; p -> next = temp; if (p == last) last = temp; return last; } p = p -> next; } while(p != last -> next); cout << item << " not present in the list." << endl; return last; } void traverse(struct Node *last) { struct Node *p; // If list is empty, return. if (last == NULL) { cout << "List is empty." << endl; return; } // Pointing to first Node of the list. p = last -> next; // Traversing the list. do { cout << p -> data << " "; p = p -> next; } while(p != last->next); } // Driven Program int main() { struct Node *last = NULL; last = addToEmpty(last, 6); last = addBegin(last, 4); last = addBegin(last, 2); last = addEnd(last, 8); last = addEnd(last, 12); last = addAfter(last, 10, 8); traverse(last); return 0; }

Java

class GFG { static class Node { int data; Node next; }; static Node addToEmpty(Node last, int data) { // This function is only for empty list if (last != null) return last; // Creating a node dynamically. Node temp = new Node(); // Assigning the data. temp.data = data; last = temp; // Creating the link. last.next = last; return last; } static Node addBegin(Node last, int data) { if (last == null) return addToEmpty(last, data); Node temp = new Node(); temp.data = data; temp.next = last.next; last.next = temp; return last; } static Node addEnd(Node last, int data) { if (last == null) return addToEmpty(last, data); Node temp = new Node(); temp.data = data; temp.next = last.next; last.next = temp; last = temp; return last; } static Node addAfter(Node last, int data, int item) { if (last == null) return null; Node temp, p; p = last.next; do { if (p.data == item) { temp = new Node(); temp.data = data; temp.next = p.next; p.next = temp; if (p == last) last = temp; return last; } p = p.next; } while(p != last.next); System.out.println(item + " not present in the list."); return last; } static void traverse(Node last) { Node p; // If list is empty, return. if (last == null) { System.out.println("List is empty."); return; } // Pointing to first Node of the list. p = last.next; // Traversing the list. do { System.out.print(p.data + " "); p = p.next; } while(p != last.next); } // Driven code public static void main(String[] args) { Node last = null; last = addToEmpty(last, 6); last = addBegin(last, 4); last = addBegin(last, 2); last = addEnd(last, 8); last = addEnd(last, 12); last = addAfter(last, 10, 8); traverse(last); } } /* This code contributed by PrinciRaj1992 */

Python3

class Node: def __init__(self, data): self.data = data self.next = None class CircularLinkedList: def __init__(self): self.last = None # This function is only for empty list def addToEmpty(self, data): if (self.last != None): return self.last # Creating the newnode temp temp = Node(data) self.last = temp # Creating the link self.last.next = self.last return self.last def addBegin(self, data): if (self.last == None): return self.addToEmpty(data) temp = Node(data) temp.next = self.last.next self.last.next = temp return self.last def addEnd(self, data): if (self.last == None): return self.addToEmpty(data) temp = Node(data) temp.next = self.last.next self.last.next = temp self.last = temp return self.last def addAfter(self, data, item): if (self.last == None): return None temp = Node(data) p = self.last.next while p: if (p.data == item): temp.next = p.next p.next = temp if (p == self.last): self.last = temp return self.last else: return self.last p = p.next if (p == self.last.next): print(item, "not present in the list") break def traverse(self): if (self.last == None): print("List is empty") return temp = self.last.next while temp: print(temp.data, end = " ") temp = temp.next if temp == self.last.next: break # Driver Code if __name__ == '__main__': llist = CircularLinkedList() last = llist.addToEmpty(6) last = llist.addBegin(4) last = llist.addBegin(2) last = llist.addEnd(8) last = llist.addEnd(12) last = llist.addAfter(10,8) llist.traverse() # This code is contributed by # Aditya Singh

C#

using System; public class GFG { public class Node { public int data; public Node next; }; static Node addToEmpty(Node last, int data) { // This function is only for empty list if (last != null) return last; // Creating a node dynamically. Node temp = new Node(); // Assigning the data. temp.data = data; last = temp; // Creating the link. last.next = last; return last; } static Node addBegin(Node last, int data) { if (last == null) return addToEmpty(last, data); Node temp = new Node(); temp.data = data; temp.next = last.next; last.next = temp; return last; } static Node addEnd(Node last, int data) { if (last == null) return addToEmpty(last, data); Node temp = new Node(); temp.data = data; temp.next = last.next; last.next = temp; last = temp; return last; } static Node addAfter(Node last, int data, int item) { if (last == null) return null; Node temp, p; p = last.next; do { if (p.data == item) { temp = new Node(); temp.data = data; temp.next = p.next; p.next = temp; if (p == last) last = temp; return last; } p = p.next; } while(p != last.next); Console.WriteLine(item + " not present in the list."); return last; } static void traverse(Node last) { Node p; // If list is empty, return. if (last == null) { Console.WriteLine("List is empty."); return; } // Pointing to first Node of the list. p = last.next; // Traversing the list. do { Console.Write(p.data + " "); p = p.next; } while(p != last.next); } // Driven code public static void Main(String[] args) { Node last = null; last = addToEmpty(last, 6); last = addBegin(last, 4); last = addBegin(last, 2); last = addEnd(last, 8); last = addEnd(last, 12); last = addAfter(last, 10, 8); traverse(last); } } // This code contributed by Rajput-Ji

Javascript

<script> class Node { constructor() { this.data = 0; this.next = null; } } function addToEmpty(last, data) { // This function is only for empty list if (last != null) return last; // Creating a node dynamically. var temp = new Node(); // Assigning the data. temp.data = data; last = temp; // Creating the link. last.next = last; return last; } function addBegin(last, data) { if (last == null) return addToEmpty(last, data); var temp = new Node(); temp.data = data; temp.next = last.next; last.next = temp; return last; } function addEnd(last, data) { if (last == null) return addToEmpty(last, data); var temp = new Node(); temp.data = data; temp.next = last.next; last.next = temp; last = temp; return last; } function addAfter(last, data, item) { if (last == null) return null; var temp, p; p = last.next; do { if (p.data == item) { temp = new Node(); temp.data = data; temp.next = p.next; p.next = temp; if (p == last) last = temp; return last; } p = p.next; } while (p != last.next); document.write(item + " not present in the list. <br>"); return last; } function traverse(last) { var p; // If list is empty, return. if (last == null) { document.write("List is empty.<br>"); return; } // Pointing to first Node of the list. p = last.next; // Traversing the list. do { document.write(p.data + " "); p = p.next; } while (p != last.next); } // Driven code var last = null; last = addToEmpty(last, 6); last = addBegin(last, 4); last = addBegin(last, 2); last = addEnd(last, 8); last = addEnd(last, 12); last = addAfter(last, 10, 8); traverse(last); </script>

Output:

2 4 6 8 10 12

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Article Tags :

Linked List

circular linked list

Practice Tags :

Linked List

circular linked list

Circular Singly Linked List

In a circular Singly linked list, the last node of the list contains a pointer to the first node of the list. We can have circular singly linked list as well as circular doubly linked list.

We traverse a circular singly linked list until we reach the same node where we started. The circular singly liked list has no beginning and no ending. There is no null value present in the next part of any of the nodes.

The following image shows a circular singly linked list.

Circular linked list are mostly used in task maintenance in operating systems. There are many examples where circular linked list are being used in computer science including browser surfing where a record of pages visited in the past by the user, is maintained in the form of circular linked lists and can be accessed again on clicking the previous button.

Circular Linked List MCQ Questions and Answers

1. What differentiates a circular linked list from a normal linked list?

(A)You cannot have the ‘next’ pointer point to null in a circular linked list

(B) It is faster to traverse the circular linked list

(C) You may or may not have the ‘next’ pointer point to null in a circular linked list

(D) Head node is known in circular linked list

Answer: You may or may not have the ‘next’ pointer point to null in a circular linked list

2. A linear collection of data elements where the linear node is given by means of pointer is called?

(A) Linked list

(B) Node list

(C) Primitive list

(D) None

Answer: Linked list

3. Which of the following operations is performed more efficiently by doubly linked list than by singly linked list?

(A) Deleting a node whose location in given

(B) Searching of an unsorted list for a given item

(C) Inverting a node after the node with given location

(D) Traversing a list to process each node

View Answer / Hide Answer

Answer: Deleting a node whose location in given

4. Consider an implementation of unsorted singly linked list. Suppose it has its representation with a head and tail pointer. Given the representation, which of the following operation can be implemented in O(1) time?

i) Insertion at the front of the linked list

ii) Insertion at the end of the linked list

iii) Deletion of the front node of the linked list

iv) Deletion of the last node of the linked list

(A) I and II

(B) I and III

(C) I, II and III

(D) I, II and IV

Answer: I, II and III

5. Consider an implementation of unsorted singly linked list. Suppose it has its representation with a head pointer only. Given the representation, which of the following operation can be implemented in O(1) time?

i) Insertion at the front of the linked list

ii) Insertion at the end of the linked list

iii) Deletion of the front node of the linked list

iv) Deletion of the last node of the linked list

(A) I and II

(B) I and III

(C) I, II and III

(D) I, II and IV

Answer: I and III

6. Consider an implementation of unsorted doubly linked list. Suppose it has its representation with a head pointer and tail pointer. Given the representation, which of the following operation can be implemented in O(1) time?

i) Insertion at the front of the linked list

ii) Insertion at the end of the linked list

iii) Deletion of the front node of the linked list

iv) Deletion of the end node of the linked list

(A) I and II

(B) I and III

(C) I, II and III

(D) I, II, III and IV

Answer: I, II, III and IV

7. Consider an implementation of unsorted doubly linked list. Suppose it has its representation with a head pointer only. Given the representation, which of the following operation can be implemented in O(1) time?

i) Insertion at the front of the linked list

ii) Insertion at the end of the linked list

iii) Deletion of the front node of the linked list

iv) Deletion of the end node of the linked list

(A) I and II

(B) I and III

(C) I, II and III

(D) I, II, III and IV

Answer: I and III

8. Consider an implementation of unsorted circular linked list. Suppose it has its representation with a head pointer only. Given the representation, which of the following operation can be implemented in O(1) time?

i) Insertion at the front of the linked list

ii) Insertion at the end of the linked list

iii) Deletion of the front node of the linked list

iv) Deletion of the end node of the linked list

(A) I and II

(B) I and III

(C) I, II, III and IV

(D) None

Answer: None

9. Consider an implementation of unsorted circular doubly linked list. Suppose it has its representation with a head pointer only. Given the representation, which of the following operation can be implemented in O(1) time?

i) Insertion at the front of the linked list

ii) insertion at the end of the linked list

iii) Deletion of the front node of the linked list

iv) Deletion of the end node of the linked list

(A) I and II

(B) I and III

(C) I, II and III

(D) I, II, III and IV

Answer: I, II, III and IV

10. In linked list each node contain minimum of two fields. One field is data field to store the data second field is?

(A) Pointer to character

(B) Pointer to integer

(C) Pointer to node

(D) Node

Answer: Pointer to node

11. What would be the asymptotic time complexity to add a node at the end of singly linked list, if the pointer is initially pointing to the head of the list?

(A) O (1)

(B) O (n)

(C) θ (n)

(D) θ (1)

Answer: θ (n)

12. What would be the asymptotic time complexity to add an element in the linked list?

(A) O (1)

(B) O (n)

(C) O (n2)

(D) None

Answer: O (n)

13. What would be the asymptotic time complexity to find an element in the linked list?

(A) O (1)

(B) O (n)

(C) O (n2)

(D) None

Answer: O (n)

14. What would be the asymptotic time complexity to insert an element at the second position in the linked list?

(A) O (1)

(B) O (n)

(C) O (n2)

(D) None

Answer: O (1)

15. The concatenation of two list can performed in O(1) time. Which of the following variation of linked list can be used?

(A) Singly linked list

(B) Doubly linked list

(C) Circular doubly linked list

(D) Array implementation of list

Answer: Circular doubly linked list

16. In a circular linked list

(A) Components are all linked together in some sequential manner.

(B) There is no beginning and no end.

(C) Components are arranged hierarchically.

(D) Forward and backward traversal within the list is permitted.

Answer: There is no beginning and no end.

17. A variant of linked list in which last node of the list points to the first node of the list is?

(A) Singly linked list

(B) Doubly linked list

(C) Circular linked list

(D) Multiply linked list

Answer: Circular linked list

18. In doubly linked lists, traversal can be performed?

(A) Only in forward direction

(B) Only in reverse direction

(C) In both directions

(D) None

Answer: In both directions

19. What kind of linked list is best to answer question like “What is the item at position n?”

(A) Singly linked list

(B) Doubly linked list

(C) Circular linked list

(D) Array implementation of linked list

Answer: Array implementation of linked list

20. A variation of linked list is circular linked list, in which the last node in the list points to first node of the list. One problem with this type of list is?

(A) It waste memory space since the pointer head already points to the first node and thus the list node does not need to point to the first node.

(B) It is not possible to add a node at the end of the list.

(C) It is difficult to traverse the list as the pointer of the last node is now not NULL

(D) All of above

Answer: It is difficult to traverse the list as the pointer of the last node is now not NULL

A circular linked list is a variation of a linked list in which the last node points to the first node, completing a full circle of nodes. In other words, this variation of the linked list doesn’t have a null element at the end. A circular linked list can be implemented using doubly-linked lists or other more specialized data structures which are supported directly by computer hardware.

The circular linked list is a nonlinear data structure that can be implemented easily in computer programming languages. This data structure contains nodes that are connected to each other in a looped fashion, which means that the last node is connected to the first node and this one-way connection enables the nodes to store information easily.

Many of the programming languages support this data structure for its capability to make quick work of complex tasks, which are otherwise time-consuming. The major advantage of using the data structure is the simplicity of implementing it without having to write any complicated algorithms or code. Different programming languages offer different advantages over other, but primarily you should consider your experience, familiarity with the language, and the features that are available based on your needs.

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