Copy linked list using recursion

Here given code implementation process.

// C program for 
// Copy linked list using recursion
#include <stdio.h>

#include <stdlib.h>

// Linked List LinkNode
struct LinkNode
{
	int data;
	struct LinkNode *next;
};
// Singly linked list 
struct SingleLL
{
	struct LinkNode *head;
	struct LinkNode *tail;
};
// Returns the new linked list
struct SingleLL *newLinkedList()
{
	// Create memory of head and tail Nodes
	struct SingleLL *sll = (struct SingleLL *) malloc(sizeof(struct SingleLL));
	if (sll == NULL)
	{
		printf("Memory overflow\n");
	}
	else
	{
		sll->head = NULL;
		sll->tail = NULL;
	}
	return sll;
}
// Returns the new node of linked list
struct LinkNode *createNode(int data)
{
	// Create dynamic node
	struct LinkNode *node = (struct LinkNode *) malloc(sizeof(struct LinkNode));
	if (node == NULL)
	{
		printf("Memory overflow to Create LinkNode\n");
	}
	else
	{
		// Set initial node value
		node->data = data;
		node->next = NULL;
	}
	return node;
}
// Handles the request of adding new node in linked list
void addNode(struct SingleLL *sll, int data)
{
	struct LinkNode *node = createNode(data);
	if (sll->head == NULL)
	{
		sll->head = node;
	}
	else
	{
		// Append the node at last position
		sll->tail->next = node;
	}
	sll->tail = node;
}
// Display linked list element
void display(struct SingleLL *sll)
{
	if (sll->head == NULL)
	{
		return;
	}
	struct LinkNode *temp = sll->head;
	// iterating linked list elements
	while (temp != NULL)
	{
		printf(" %d →", temp->data);
		// Visit to next node
		temp = temp->next;
	}
	printf(" NULL\n");
}
// This is cloning the linked list node using recursive
struct LinkNode *clones(struct LinkNode *node)
{
	if (node == NULL)
	{
		return NULL;
	}
	// Create new node
	struct LinkNode *auxiliary = createNode(node->data);
	// Connect with next node
	auxiliary->next = clones(node->next);
	// Return new node
	return auxiliary;
}
struct SingleLL *cloneLinkList(struct SingleLL *actual)
{
	// Create new linked list
	struct SingleLL *colon = newLinkedList();
	// Recursively clone the next nodes
	colon->head = clones(actual->head);
	// Get the first node of clone linked list
	struct LinkNode *auxiliary = colon->head;
	// Find last node
	while (auxiliary != NULL && auxiliary->next != NULL)
	{
		auxiliary = auxiliary->next;
	}
	// Set tail node
	colon->tail = auxiliary;
	return colon;
}
int main(int argc, char const *argv[])
{
	struct SingleLL *actual = newLinkedList();
	//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	addNode(actual, 1);
	addNode(actual, 2);
	addNode(actual, 3);
	addNode(actual, 4);
	addNode(actual, 5);
	addNode(actual, 6);
	addNode(actual, 7);
	addNode(actual, 8);
	// Display given linked list
	printf("\n Before colon  ");
	printf("\n Actual Linked List  : ");
	display(actual);
	struct SingleLL *colon = cloneLinkList(actual);
	// Display resultant linked list
	printf("\n After colon  ");
	printf("\n Colon Linked List  : ");
	display(colon);
	// Display resultant linked list
	printf("\n After add new element   ");
	printf("\n Colon Linked List  : ");
	addNode(colon, 10);
	display(colon);
	printf("\n Actual Linked List  : ");
	display(actual);
	return 0;
}

input

 Before colon
 Actual Linked List  :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List  :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List  :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List  :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
/*
  Java Program for 
  Copy linked list using recursion
*/
// Linked list node
class LinkNode
{
	public int data;
	public LinkNode next;
	public LinkNode(int data)
	{
		this.data = data;
		this.next = null;
	}
}
public class SingleLL
{
	public LinkNode head;
	public LinkNode tail;
	public SingleLL()
	{
		this.head = null;
		this.tail = null;
	}
	// Add new Node at end of linked list 
	public void addNode(int data)
	{
		LinkNode node = new LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	public void display()
	{
		if (this.head == null)
		{
			System.out.println("\n Empty linked list");
			return;
		}
		LinkNode temp = this.head;
		//iterating linked list elements
		while (temp != null)
		{
			System.out.print(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		System.out.println(" NULL");
	}
	// This is cloning the linked list node using recursive
	public LinkNode clones(LinkNode node)
	{
		if (node == null)
		{
			return null;
		}
		// Create new node
		LinkNode auxiliary = new LinkNode(node.data);
		// Connect with next node
		auxiliary.next = clones(node.next);
		// Return new node
		return auxiliary;
	}
	public SingleLL cloneLinkList()
	{
		// Create new linked list
		SingleLL colon = new SingleLL();
		// Recursively clone the next nodes
		colon.head = clones(this.head);
		// Get the first node of clone linked list
		LinkNode auxiliary = colon.head;
		// Find last node
		while (auxiliary != null && auxiliary.next != null)
		{
			auxiliary = auxiliary.next;
		}
		// Set tail node
		colon.tail = auxiliary;
		return colon;
	}
	public static void main(String[] args)
	{
		SingleLL actual = new SingleLL();
      	// Creating linked list
		//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
		actual.addNode(1);
		actual.addNode(2);
		actual.addNode(3);
		actual.addNode(4);
		actual.addNode(5);
		actual.addNode(6);
		actual.addNode(7);
		actual.addNode(8);
		// Display given linked list
		System.out.print("\n Before colon ");
		System.out.print("\n Actual Linked List :");
		actual.display();
		// Colon linked list
		SingleLL colon = actual.cloneLinkList();
		// Display resultant linked list
		System.out.print("\n After colon ");
		System.out.print("\n Colon Linked List :");
		colon.display();
		// Display resultant linked list
		System.out.print("\n After add new element ");
		System.out.print("\n Colon Linked List :");
		colon.addNode(10);
		colon.display();
		System.out.print("\n Actual Linked List : ");
		actual.display();
	}
}

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
// Include header file
#include <iostream>
using namespace std;

/*
  C++ Program for 
  Copy linked list using recursion
*/

// Linked list node
class LinkNode
{
	public: 
    int data;
	LinkNode *next;
	LinkNode(int data)
	{
		this->data = data;
		this->next = NULL;
	}
};
class SingleLL
{
	public: 
    LinkNode *head;
	LinkNode *tail;
	SingleLL()
	{
		this->head = NULL;
		this->tail = NULL;
	}
	// Add new Node at end of linked list 
	void addNode(int data)
	{
		LinkNode *node = new LinkNode(data);
		if (this->head == NULL)
		{
			this->head = node;
		}
		else
		{
			// Append the node at last position
			this->tail->next = node;
		}
		this->tail = node;
	}
	// Display linked list element
	void display()
	{
		if (this->head == NULL)
		{
			cout << "\n Empty linked list" << endl;
			return;
		}
		LinkNode *temp = this->head;
		//iterating linked list elements
		while (temp != NULL)
		{
			cout << " " << temp->data << " →";
			// Visit to next node
			temp = temp->next;
		}
		cout << " NULL" << endl;
	}
	// This is cloning the linked list node using recursive
	LinkNode *clones(LinkNode *node)
	{
		if (node == NULL)
		{
			return NULL;
		}
		// Create new node
		LinkNode *auxiliary = new LinkNode(node->data);
		// Connect with next node
		auxiliary->next = this->clones(node->next);
		// Return new node
		return auxiliary;
	}
	SingleLL *cloneLinkList()
	{
		// Create new linked list
		SingleLL *colon = new SingleLL();
		// Recursively clone the next nodes
		colon->head = this->clones(this->head);
		// Get the first node of clone linked list
		LinkNode *auxiliary = colon->head;
		// Find last node
		while (auxiliary != NULL && auxiliary->next != NULL)
		{
			auxiliary = auxiliary->next;
		}
		// Set tail node
		colon->tail = auxiliary;
		return colon;
	}
};
int main()
{
	SingleLL *actual = new SingleLL();
	// Creating linked list
	//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	actual->addNode(1);
	actual->addNode(2);
	actual->addNode(3);
	actual->addNode(4);
	actual->addNode(5);
	actual->addNode(6);
	actual->addNode(7);
	actual->addNode(8);
	// Display given linked list
	cout << "\n Before colon ";
	cout << "\n Actual Linked List :";
	actual->display();
	// Colon linked list
	SingleLL *colon = actual->cloneLinkList();
	// Display resultant linked list
	cout << "\n After colon ";
	cout << "\n Colon Linked List :";
	colon->display();
	// Display resultant linked list
	cout << "\n After add new element ";
	cout << "\n Colon Linked List :";
	colon->addNode(10);
	colon->display();
	cout << "\n Actual Linked List : ";
	actual->display();
	return 0;
}

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
/*
  Java Program for 
  Copy linked list using recursion
*/
// Linked list node
class LinkNode
{
	public int data;
	public LinkNode next;
	public LinkNode(int data)
	{
		this.data = data;
		this.next = null;
	}
}
public class SingleLL
{
	public LinkNode head;
	public LinkNode tail;
	public SingleLL()
	{
		this.head = null;
		this.tail = null;
	}
	// Add new Node at end of linked list 
	public void addNode(int data)
	{
		LinkNode node = new LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	public void display()
	{
		if (this.head == null)
		{
			System.out.println("\n Empty linked list");
			return;
		}
		LinkNode temp = this.head;
		//iterating linked list elements
		while (temp != null)
		{
			System.out.print(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		System.out.println(" NULL");
	}
	// This is cloning the linked list node using recursive
	public LinkNode clones(LinkNode node)
	{
		if (node == null)
		{
			return null;
		}
		// Create new node
		LinkNode auxiliary = new LinkNode(node.data);
		// Connect with next node
		auxiliary.next = clones(node.next);
		// Return new node
		return auxiliary;
	}
	public SingleLL cloneLinkList()
	{
		// Create new linked list
		SingleLL colon = new SingleLL();
		// Recursively clone the next nodes
		colon.head = clones(this.head);
		// Get the first node of clone linked list
		LinkNode auxiliary = colon.head;
		// Find last node
		while (auxiliary != null && auxiliary.next != null)
		{
			auxiliary = auxiliary.next;
		}
		// Set tail node
		colon.tail = auxiliary;
		return colon;
	}
	public static void main(String[] args)
	{
		SingleLL actual = new SingleLL();
		// Creating linked list
		//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
		actual.addNode(1);
		actual.addNode(2);
		actual.addNode(3);
		actual.addNode(4);
		actual.addNode(5);
		actual.addNode(6);
		actual.addNode(7);
		actual.addNode(8);
		// Display given linked list
		System.out.print("\n Before colon ");
		System.out.print("\n Actual Linked List :");
		actual.display();
		// Colon linked list
		SingleLL colon = actual.cloneLinkList();
		// Display resultant linked list
		System.out.print("\n After colon ");
		System.out.print("\n Colon Linked List :");
		colon.display();
		// Display resultant linked list
		System.out.print("\n After add new element ");
		System.out.print("\n Colon Linked List :");
		colon.addNode(10);
		colon.display();
		System.out.print("\n Actual Linked List : ");
		actual.display();
	}
}

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
<?php
/*
  Php Program for 
  Copy linked list using recursion
*/
// Linked list node
class LinkNode
{
	public $data;
	public $next;
	public	function __construct($data)
	{
		$this->data = $data;
		$this->next = NULL;
	}
}
class SingleLL
{
	public $head;
	public $tail;
	public	function __construct()
	{
		$this->head = NULL;
		$this->tail = NULL;
	}
	// Add new Node at end of linked list 
	public	function addNode($data)
	{
		$node = new LinkNode($data);
		if ($this->head == NULL)
		{
			$this->head = $node;
		}
		else
		{
			// Append the node at last position
			$this->tail->next = $node;
		}
		$this->tail = $node;
	}
	// Display linked list element
	public	function display()
	{
		if ($this->head == NULL)
		{
			echo("\n Empty linked list".
				"\n");
			return;
		}
		$temp = $this->head;
		//iterating linked list elements
		while ($temp != NULL)
		{
			echo(" ".$temp->data.
				" →");
			// Visit to next node
			$temp = $temp->next;
		}
		echo(" NULL".
			"\n");
	}
	// This is cloning the linked list node using recursive
	public	function clones($node)
	{
		if ($node == NULL)
		{
			return NULL;
		}
		// Create new node
		$auxiliary = new LinkNode($node->data);
		// Connect with next node
		$auxiliary->next = $this->clones($node->next);
		// Return new node
		return $auxiliary;
	}
	public	function cloneLinkList()
	{
		// Create new linked list
		$colon = new SingleLL();
		// Recursively clone the next nodes
		$colon->head = $this->clones($this->head);
		// Get the first node of clone linked list
		$auxiliary = $colon->head;
		// Find last node
		while ($auxiliary != NULL && $auxiliary->next != NULL)
		{
			$auxiliary = $auxiliary->next;
		}
		// Set tail node
		$colon->tail = $auxiliary;
		return $colon;
	}
}

function main()
{
	$actual = new SingleLL();
	// Creating linked list
	//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	$actual->addNode(1);
	$actual->addNode(2);
	$actual->addNode(3);
	$actual->addNode(4);
	$actual->addNode(5);
	$actual->addNode(6);
	$actual->addNode(7);
	$actual->addNode(8);
	// Display given linked list
	echo("\n Before colon ");
	echo("\n Actual Linked List :");
	$actual->display();
	// Colon linked list
	$colon = $actual->cloneLinkList();
	// Display resultant linked list
	echo("\n After colon ");
	echo("\n Colon Linked List :");
	$colon->display();
	// Display resultant linked list
	echo("\n After add new element ");
	echo("\n Colon Linked List :");
	$colon->addNode(10);
	$colon->display();
	echo("\n Actual Linked List : ");
	$actual->display();
}
main();

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
/*
  Node JS Program for 
  Copy linked list using recursion
*/
// Linked list node
class LinkNode
{
	constructor(data)
	{
		this.data = data;
		this.next = null;
	}
}
class SingleLL
{
	constructor()
	{
		this.head = null;
		this.tail = null;
	}
	// Add new Node at end of linked list 
	addNode(data)
	{
		var node = new LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	display()
	{
		if (this.head == null)
		{
			console.log("\n Empty linked list");
			return;
		}
		var temp = this.head;
		//iterating linked list elements
		while (temp != null)
		{
			process.stdout.write(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		console.log(" NULL");
	}
	// This is cloning the linked list node using recursive
	clones(node)
	{
		if (node == null)
		{
			return null;
		}
		// Create new node
		var auxiliary = new LinkNode(node.data);
		// Connect with next node
		auxiliary.next = this.clones(node.next);
		// Return new node
		return auxiliary;
	}
	cloneLinkList()
	{
		// Create new linked list
		var colon = new SingleLL();
		// Recursively clone the next nodes
		colon.head = this.clones(this.head);
		// Get the first node of clone linked list
		var auxiliary = colon.head;
		// Find last node
		while (auxiliary != null && auxiliary.next != null)
		{
			auxiliary = auxiliary.next;
		}
		// Set tail node
		colon.tail = auxiliary;
		return colon;
	}
}

function main()
{
	var actual = new SingleLL();
	// Creating linked list
	//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	actual.addNode(1);
	actual.addNode(2);
	actual.addNode(3);
	actual.addNode(4);
	actual.addNode(5);
	actual.addNode(6);
	actual.addNode(7);
	actual.addNode(8);
	// Display given linked list
	process.stdout.write("\n Before colon ");
	process.stdout.write("\n Actual Linked List :");
	actual.display();
	// Colon linked list
	var colon = actual.cloneLinkList();
	// Display resultant linked list
	process.stdout.write("\n After colon ");
	process.stdout.write("\n Colon Linked List :");
	colon.display();
	// Display resultant linked list
	process.stdout.write("\n After add new element ");
	process.stdout.write("\n Colon Linked List :");
	colon.addNode(10);
	colon.display();
	process.stdout.write("\n Actual Linked List : ");
	actual.display();
}
main();

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
#  Python 3 Program for 
#  Copy linked list using recursion

#  Linked list node
class LinkNode :
	def __init__(self, data) :
		self.data = data
		self.next = None
	

class SingleLL :
	def __init__(self) :
		self.head = None
		self.tail = None
	
	#  Add new Node at end of linked list 
	def addNode(self, data) :
		node = LinkNode(data)
		if (self.head == None) :
			self.head = node
		else :
			#  Append the node at last position
			self.tail.next = node
		
		self.tail = node
	
	#  Display linked list element
	def display(self) :
		if (self.head == None) :
			print("\n Empty linked list")
			return
		
		temp = self.head
		# iterating linked list elements
		while (temp != None) :
			print("", temp.data ,"→", end = "")
			#  Visit to next node
			temp = temp.next
		
		print(" NULL")
	
	#  This is cloning the linked list node using recursive
	def clones(self, node) :
		if (node == None) :
			return None
		
		#  Create new node
		auxiliary = LinkNode(node.data)
		#  Connect with next node
		auxiliary.next = self.clones(node.next)
		#  Return new node
		return auxiliary
	
	def cloneLinkList(self) :
		#  Create new linked list
		colon = SingleLL()
		#  Recursively clone the next nodes
		colon.head = self.clones(self.head)
		#  Get the first node of clone linked list
		auxiliary = colon.head
		#  Find last node
		while (auxiliary != None and auxiliary.next != None) :
			auxiliary = auxiliary.next
		
		#  Set tail node
		colon.tail = auxiliary
		return colon
	

def main() :
	actual = SingleLL()
	#  Creating linked list
	#   1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	actual.addNode(1)
	actual.addNode(2)
	actual.addNode(3)
	actual.addNode(4)
	actual.addNode(5)
	actual.addNode(6)
	actual.addNode(7)
	actual.addNode(8)
	#  Display given linked list
	print("\n Before colon ", end = "")
	print("\n Actual Linked List :", end = "")
	actual.display()
	#  Colon linked list
	colon = actual.cloneLinkList()
	#  Display resultant linked list
	print("\n After colon ", end = "")
	print("\n Colon Linked List :", end = "")
	colon.display()
	#  Display resultant linked list
	print("\n After add new element ", end = "")
	print("\n Colon Linked List :", end = "")
	colon.addNode(10)
	colon.display()
	print("\n Actual Linked List : ", end = "")
	actual.display()

if __name__ == "__main__": main()

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
#  Ruby Program for 
#  Copy linked list using recursion

#  Linked list node
class LinkNode 
	# Define the accessor and reader of class LinkNode
	attr_reader :data, :next
	attr_accessor :data, :next
	def initialize(data) 
		self.data = data
		self.next = nil
	end

end

class SingleLL 
	# Define the accessor and reader of class SingleLL
	attr_reader :head, :tail
	attr_accessor :head, :tail
	def initialize() 
		self.head = nil
		self.tail = nil
	end

	#  Add new Node at end of linked list 
	def addNode(data) 
		node = LinkNode.new(data)
		if (self.head == nil) 
			self.head = node
		else 
			#  Append the node at last position
			self.tail.next = node
		end

		self.tail = node
	end

	#  Display linked list element
	def display() 
		if (self.head == nil) 
			print("\n Empty linked list", "\n")
			return
		end

		temp = self.head
		# iterating linked list elements
		while (temp != nil) 
			print(" ", temp.data ," →")
			#  Visit to next node
			temp = temp.next
		end

		print(" NULL", "\n")
	end

	#  This is cloning the linked list node using recursive
	def clones(node) 
		if (node == nil) 
			return nil
		end

		#  Create new node
		auxiliary = LinkNode.new(node.data)
		#  Connect with next node
		auxiliary.next = self.clones(node.next)
		#  Return new node
		return auxiliary
	end

	def cloneLinkList() 
		#  Create new linked list
		colon = SingleLL.new()
		#  Recursively clone the next nodes
		colon.head = self.clones(self.head)
		#  Get the first node of clone linked list
		auxiliary = colon.head
		#  Find last node
		while (auxiliary != nil && auxiliary.next != nil) 
			auxiliary = auxiliary.next
		end

		#  Set tail node
		colon.tail = auxiliary
		return colon
	end

end

def main() 
	actual = SingleLL.new()
	#  Creating linked list
	#   1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	actual.addNode(1)
	actual.addNode(2)
	actual.addNode(3)
	actual.addNode(4)
	actual.addNode(5)
	actual.addNode(6)
	actual.addNode(7)
	actual.addNode(8)
	#  Display given linked list
	print("\n Before colon ")
	print("\n Actual Linked List :")
	actual.display()
	#  Colon linked list
	colon = actual.cloneLinkList()
	#  Display resultant linked list
	print("\n After colon ")
	print("\n Colon Linked List :")
	colon.display()
	#  Display resultant linked list
	print("\n After add new element ")
	print("\n Colon Linked List :")
	colon.addNode(10)
	colon.display()
	print("\n Actual Linked List : ")
	actual.display()
end

main()

input

 Before colon 
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon 
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element 
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
/*
  Scala Program for 
  Copy linked list using recursion
*/
// Linked list node
class LinkNode(var data: Int , var next: LinkNode)
{
	def this(data: Int)
	{
		this(data,null);
	}
}
class SingleLL(var head: LinkNode , var tail: LinkNode)
{
	def this()
	{
		this(null,null);
	}
	// Add new Node at end of linked list 
	def addNode(data: Int): Unit = {
		var node: LinkNode = new LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	def display(): Unit = {
		if (this.head == null)
		{
			println("\n Empty linked list");
			return;
		}
		var temp: LinkNode = this.head;
		//iterating linked list elements
		while (temp != null)
		{
			print(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		println(" NULL");
	}
	// This is cloning the linked list node using recursive
	def clones(node: LinkNode): LinkNode = {
		if (node == null)
		{
			return null;
		}
		// Create new node
		var auxiliary: LinkNode = new LinkNode(node.data);
		// Connect with next node
		auxiliary.next = clones(node.next);
		// Return new node
		return auxiliary;
	}
	def cloneLinkList(): SingleLL = {
		// Create new linked list
		var colon: SingleLL = new SingleLL();
		// Recursively clone the next nodes
		colon.head = clones(this.head);
		// Get the first node of clone linked list
		var auxiliary: LinkNode = colon.head;
		// Find last node
		while (auxiliary != null && auxiliary.next != null)
		{
			auxiliary = auxiliary.next;
		}
		// Set tail node
		colon.tail = auxiliary;
		return colon;
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var actual: SingleLL = new SingleLL();
		// Creating linked list
		//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
		actual.addNode(1);
		actual.addNode(2);
		actual.addNode(3);
		actual.addNode(4);
		actual.addNode(5);
		actual.addNode(6);
		actual.addNode(7);
		actual.addNode(8);
		// Display given linked list
		print("\n Before colon ");
		print("\n Actual Linked List :");
		actual.display();
		// Colon linked list
		var colon: SingleLL = actual.cloneLinkList();
		// Display resultant linked list
		print("\n After colon ");
		print("\n Colon Linked List :");
		colon.display();
		// Display resultant linked list
		print("\n After add new element ");
		print("\n Colon Linked List :");
		colon.addNode(10);
		colon.display();
		print("\n Actual Linked List : ");
		actual.display();
	}
}

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
/*
  Swift 4 Program for 
  Copy linked list using recursion
*/
// Linked list node
class LinkNode
{
	var data: Int;
	var next: LinkNode? ;
	init(_ data: Int)
	{
		self.data = data;
		self.next = nil;
	}
}
class SingleLL
{
	var head: LinkNode? ;
	var tail: LinkNode? ;
	init()
	{
		self.head = nil;
		self.tail = nil;
	}
	// Add new Node at end of linked list 
	func addNode(_ data: Int)
	{
		let node: LinkNode = LinkNode(data);
		if (self.head == nil)
		{
			self.head = node;
		}
		else
		{
			// Append the node at last position
			self.tail!.next = node;
		}
		self.tail = node;
	}
	// Display linked list element
	func display()
	{
		if (self.head == nil)
		{
			print("\n Empty linked list");
			return;
		}
		var temp: LinkNode? = self.head;
		//iterating linked list elements
		while (temp  != nil)
		{
			print("", temp!.data ,"→", terminator: "");
			// Visit to next node
			temp = temp!.next;
		}
		print(" NULL");
	}
	// This is cloning the linked list node using recursive
	func clones(_ node: LinkNode? )->LinkNode?
	{
		if (node == nil)
		{
			return nil;
		}
		// Create new node
		let auxiliary: LinkNode? = LinkNode(node!.data);
		// Connect with next node
		auxiliary!.next = self.clones(node!.next);
		// Return new node
		return auxiliary;
	}
	func cloneLinkList()->SingleLL
	{
		// Create new linked list
		let colon: SingleLL = SingleLL();
		// Recursively clone the next nodes
		colon.head = self.clones(self.head);
		// Get the first node of clone linked list
		var auxiliary: LinkNode? = colon.head;
		// Find last node
		while (auxiliary  != nil && auxiliary!.next  != nil)
		{
			auxiliary = auxiliary!.next;
		}
		// Set tail node
		colon.tail = auxiliary;
		return colon;
	}
}
func main()
{
	let actual: SingleLL = SingleLL();
	// Creating linked list
	//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	actual.addNode(1);
	actual.addNode(2);
	actual.addNode(3);
	actual.addNode(4);
	actual.addNode(5);
	actual.addNode(6);
	actual.addNode(7);
	actual.addNode(8);
	// Display given linked list
	print("\n Before colon ", terminator: "");
	print("\n Actual Linked List :", terminator: "");
	actual.display();
	// Colon linked list
	let colon: SingleLL = actual.cloneLinkList();
	// Display resultant linked list
	print("\n After colon ", terminator: "");
	print("\n Colon Linked List :", terminator: "");
	colon.display();
	// Display resultant linked list
	print("\n After add new element ", terminator: "");
	print("\n Colon Linked List :", terminator: "");
	colon.addNode(10);
	colon.display();
	print("\n Actual Linked List : ", terminator: "");
	actual.display();
}
main();

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
/*
  Kotlin Program for 
  Copy linked list using recursion
*/
// Linked list node
class LinkNode
{
	var data: Int;
	var next: LinkNode ? ;
	constructor(data: Int)
	{
		this.data = data;
		this.next = null;
	}
}
class SingleLL
{
	var head: LinkNode ? ;
	var tail: LinkNode ? ;
	constructor()
	{
		this.head = null;
		this.tail = null;
	}
	// Add new Node at end of linked list 
	fun addNode(data: Int): Unit
	{
		val node: LinkNode = LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail?.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	fun display(): Unit
	{
		if (this.head == null)
		{
			println("\n Empty linked list");
			return;
		}
		var temp: LinkNode ? = this.head;
		//iterating linked list elements
		while (temp != null)
		{
			print(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		println(" NULL");
	}
	// This is cloning the linked list node using recursive
	fun clones(node: LinkNode ? ): LinkNode ?
	{
		if (node == null)
		{
			return null;
		}
		// Create new node
		var auxiliary: LinkNode  = LinkNode(node.data);
		// Connect with next node
		auxiliary.next = this.clones(node.next);
		// Return new node
		return auxiliary;
	}
	fun cloneLinkList(): SingleLL
	{
		// Create new linked list
		val colon: SingleLL = SingleLL();
		// Recursively clone the next nodes
		colon.head = this.clones(this.head);
		// Get the first node of clone linked list
		var auxiliary: LinkNode ? = colon.head;
		// Find last node
		while (auxiliary != null && auxiliary.next != null)
		{
			auxiliary = auxiliary.next;
		}
		// Set tail node
		colon.tail = auxiliary;
		return colon;
	}
}
fun main(args: Array < String > ): Unit
{
	val actual: SingleLL = SingleLL();
	// Creating linked list
	//  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL
	actual.addNode(1);
	actual.addNode(2);
	actual.addNode(3);
	actual.addNode(4);
	actual.addNode(5);
	actual.addNode(6);
	actual.addNode(7);
	actual.addNode(8);
	// Display given linked list
	print("\n Before colon ");
	print("\n Actual Linked List :");
	actual.display();
	// Colon linked list
	val colon: SingleLL = actual.cloneLinkList();
	// Display resultant linked list
	print("\n After colon ");
	print("\n Colon Linked List :");
	colon.display();
	// Display resultant linked list
	print("\n After add new element ");
	print("\n Colon Linked List :");
	colon.addNode(10);
	colon.display();
	print("\n Actual Linked List : ");
	actual.display();
}

input

 Before colon
 Actual Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After colon
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL

 After add new element
 Colon Linked List : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 10 → NULL

 Actual Linked List :  1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → NULL


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