// Iterative C++ program to reverse a linked list #include  using namespace std; /* Link list node */ struct Node {  int data;  struct Node* next;  Node(int data)  {  this->data = data;  næste = NULL;  } }; struct LinkedList { Node* hoved;  LinkedList() { head = NULL; } /* Funktion til at vende den sammenkædede liste */ void reverse() { // Initialiser aktuelle, forrige og næste pointere Node* nuværende = hoved;  Node *prev = NULL, *next = NULL;  while (current != NULL) { // Store next next = current->next;  // Vend den nuværende nodes pointer strøm->næste = prev;  // Flyt markører én position frem.  forrige = nuværende;  nuværende = næste;  } hoved = forrige;  } /* Funktion til at udskrive linket liste */ void print() { struct Node* temp = head;  mens (temp != NULL) { cout<< temp->data<< ' ';  temp = temp->Næste;  } } void push(int data) { Node* temp = new Node(data);  temp->næste = hoved;  hoved = temp;  } }; /* Driverkode*/ int main() { /* Start med den tomme liste */ LinkedList ll;  ll.push(20);  ll.push(4);  ll.push(15);  ll.skub(85);  cout<< 'Given linked list
';  ll.print();  ll.reverse();  cout << '
Reversed linked list 
';  ll.print();  return 0; }>

// Iterative C program to reverse a linked list #include  #include  /* Link list node */ struct Node {  int data;  struct Node* next; }; /* Function to reverse the linked list */ static void reverse(struct Node** head_ref) {  struct Node* prev = NULL;  struct Node* current = *head_ref;  struct Node* next = NULL;  while (current != NULL) {  // Store next  next = current->Næste;  // Vend den nuværende nodes pointer strøm->næste = prev;  // Flyt markører én position frem.  forrige = nuværende;  nuværende = næste;  } *head_ref = forrige; } /* Funktion til at skubbe en node */ void push(struct Node** head_ref, int new_data) { struct Node* new_node = (struct Node*)malloc(sizeof(struct Node));  new_node->data = new_data;  new_node->next = (*head_ref);  (*hoved_ref) = ny_node; } /* Funktion til at udskrive linket liste */ void printList(struct Node* head) { struct Node* temp = head;  while (temp != NULL) { printf('%d ', temp->data);  temp = temp->næste;  } } /* Driverkode*/ int main() { /* Start med den tomme liste */ struct Node* head = NULL;  push(&hoved, 20);  push(&hoved, 4);  push(&hoved, 15);  push(&hoved, 85);  printf('Given linket liste
');  printList(hoved);  reverse(&head);  printf('
Omvendt linket liste 
');  printList(hoved);  getchar(); }>

// Java program for reversing the linked list class LinkedList {  static Node head;  static class Node {  int data;  Node next;  Node(int d)  {  data = d;  next = null;  }  }  /* Function to reverse the linked list */  Node reverse(Node node)  {  Node prev = null;  Node current = node;  Node next = null;  while (current != null) {  next = current.next;  current.next = prev;  prev = current;  current = next;  }  node = prev;  return node;  }  // prints content of double linked list  void printList(Node node)  {  while (node != null) {  System.out.print(node.data + ' ');  node = node.next;  }  }  // Driver Code  public static void main(String[] args)  {  LinkedList list = new LinkedList();  list.head = new Node(85);  list.head.next = new Node(15);  list.head.next.next = new Node(4);  list.head.next.next.next = new Node(20);  System.out.println('Given linked list');  list.printList(head);  head = list.reverse(head);  System.out.println('');  System.out.println('Reversed linked list ');  list.printList(head);  } } // This code has been contributed by Mayank Jaiswal>

# Python program to reverse a linked list # Time Complexity : O(n) # Space Complexity : O(1) # Node class class Node: # Constructor to initialize the node object def __init__(self, data): self.data = data self.next = None class LinkedList: # Function to initialize head def __init__(self): self.head = None # Function to reverse the linked list def reverse(self): prev = None current = self.head while(current is not None): next = current.next current.next = prev prev = current current = next self.head = prev # Function to insert a new node at the beginning def push(self, new_data): new_node = Node(new_data) new_node.next = self.head self.head = new_node # Utility function to print the LinkedList def printList(self): temp = self.head while(temp): print(temp.data, end=' ') temp = temp.next # Driver code llist = LinkedList() llist.push(20) llist.push(4) llist.push(15) llist.push(85) print ('Given linked list') llist.printList() llist.reverse() print ('
Reversed linked list') llist.printList() # This code is contributed by Nikhil Kumar Singh(nickzuck_007)>

// C# program for reversing the linked list using System; class GFG {  // Driver Code  static void Main(string[] args)  {  LinkedList list = new LinkedList();  list.AddNode(new LinkedList.Node(85));  list.AddNode(new LinkedList.Node(15));  list.AddNode(new LinkedList.Node(4));  list.AddNode(new LinkedList.Node(20));  // List before reversal  Console.WriteLine('Given linked list ');  list.PrintList();  // Reverse the list  list.ReverseList();  // List after reversal  Console.WriteLine('Reversed linked list ');  list.PrintList();  } } class LinkedList {  Node head;  public class Node {  public int data;  public Node next;  public Node(int d)  {  data = d;  next = null;  }  }  // function to add a new node at  // the end of the list  public void AddNode(Node node)  {  if (head == null)  head = node;  else {  Node temp = head;  while (temp.next != null) {  temp = temp.next;  }  temp.next = node;  }  }  // function to reverse the list  public void ReverseList()  {  Node prev = null, current = head, next = null;  while (current != null) {  next = current.next;  current.next = prev;  prev = current;  current = next;  }  head = prev;  }  // function to print the list data  public void PrintList()  {  Node current = head;  while (current != null) {  Console.Write(current.data + ' ');  current = current.next;  }  Console.WriteLine();  } } // This code is contributed by Mayank Sharma>

>

// Recursive C++ program to reverse // a linked list #include  using namespace std; /* Link list node */ struct Node {  int data;  struct Node* next;  Node(int data)  {  this->data = data;  næste = NULL;  } }; struct LinkedList { Node* hoved;  LinkedList() { head = NULL; } Node* reverse(Node* head) /* Funktion til at udskrive linket liste */ void print() { struct Node* temp = head;  mens (temp != NULL) { cout<< temp->data<< ' ';  temp = temp->Næste;  } } void push(int data) { Node* temp = new Node(data);  temp->næste = hoved;  hoved = temp;  } }; /* Driverprogram til at teste ovenstående funktion*/ int main() { /* Start med den tomme liste */ LinkedList ll;  ll.push(20);  ll.push(4);  ll.push(15);  ll.skub(85);  cout<< 'Given linked list
';  ll.print();  ll.head = ll.reverse(ll.head);  cout << '
Reversed linked list 
';  ll.print();  return 0; }>

// Recursive Java program to reverse // a linked list import java.io.*; class recursion {  static Node head; // head of list  static class Node {  int data;  Node next;  Node(int d)  {  data = d;  next = null;  }  }  static Node reverse(Node head)    /* Function to print linked list */  static void print()  {  Node temp = head;  while (temp != null) {  System.out.print(temp.data + ' ');  temp = temp.next;  }  System.out.println();  }  static void push(int data)  {  Node temp = new Node(data);  temp.next = head;  head = temp;  }  /* Driver program to test above function*/  public static void main(String args[])  {  /* Start with the empty list */  push(20);  push(4);  push(15);  push(85);  System.out.println('Given linked list');  print();  head = reverse(head);  System.out.println('Reversed linked list');  print();  } } // This code is contributed by Prakhar Agarwal>

'''Python3 program to reverse linked list using recursive method''' # Linked List Node class Node: def __init__(self, data): self.data = data self.next = None # Create and Handle list operations class LinkedList: def __init__(self): self.head = None # Head of list # Method to reverse the list def reverse(self, head): # If head is empty or has reached the list end if head is None or head.next is None: return head # Reverse the rest list rest = self.reverse(head.next) # Put first element at the end head.next.next = head head.next = None # Fix the header pointer return rest # Returns the linked list in display format def __str__(self): linkedListStr = '' temp = self.head while temp: linkedListStr = (linkedListStr + str(temp.data) + ' ') temp = temp.next return linkedListStr # Pushes new data to the head of the list def push(self, data): temp = Node(data) temp.next = self.head self.head = temp # Driver code linkedList = LinkedList() linkedList.push(20) linkedList.push(4) linkedList.push(15) linkedList.push(85) print('Given linked list') print(linkedList) linkedList.head = linkedList.reverse(linkedList.head) print('Reversed linked list') print(linkedList) # This code is contributed by Debidutta Rath>

// Recursive C# program to // reverse a linked list using System; class recursion {  // Head of list  static Node head;  public class Node {  public int data;  public Node next;  public Node(int d)  {  data = d;  next = null;  }  }  static Node reverse(Node head)    if (head == null   // Function to print linked list  static void print()  {  Node temp = head;  while (temp != null) {  Console.Write(temp.data + ' ');  temp = temp.next;  }  Console.WriteLine();  }  static void push(int data)  {  Node temp = new Node(data);  temp.next = head;  head = temp;  }  // Driver code  public static void Main(String[] args)  {  // Start with the  // empty list  push(20);  push(4);  push(15);  push(85);  Console.WriteLine('Given linked list');  print();  head = reverse(head);  Console.WriteLine('Reversed linked list');  print();  } } // This code is contributed by gauravrajput1>

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// A simple and tail recursive C++ program to reverse // a linked list #include  using namespace std; struct Node {  int data;  struct Node* next;  Node(int x) {  data = x;  next = NULL;  } }; void reverseUtil(Node* curr, Node* prev, Node** head); // This function mainly calls reverseUtil() // with prev as NULL void reverse(Node** head) {  if (!head)  return;  reverseUtil(*head, NULL, head); } // A simple and tail-recursive function to reverse // a linked list. prev is passed as NULL initially. void reverseUtil(Node* curr, Node* prev, Node** head) {  /* If last node mark it head*/  if (!curr->næste) { *hoved = curr;  /* Update next to prev node */ curr->next = prev;  Vend tilbage;  } /* Gem curr->next node for rekursive call */ Node* next = curr->next;  /* og opdater næste ..*/ curr->next = prev;  reverseUtil(næste, curr, hoved); } // En hjælpefunktion til at udskrive en linket liste void printlist(Node* head) { while (head != NULL) { cout<< head->data<< ' ';  head = head->Næste;  } cout<< endl; } // Driver code int main() {  Node* head1 = new Node(1);  head1->næste = ny Node(2);  head1->next->next = new Node(3);  head1->next->next->next = new Node(4);  head1->next->next->next->next = new Node(5);  head1->next->next->next->next->next = new Node(6);  head1->next->next->next->next->next->next = new Node(7);  head1->next->next->next->next->next->next->next = new Node(8);  cout<< 'Given linked list
';  printlist(head1);  reverse(&head1);  cout << 'Reversed linked list
';  printlist(head1);  return 0; }>

// A simple and tail recursive C program to reverse a linked // list #include  #include  typedef struct Node {  int data;  struct Node* next; } Node; void reverseUtil(Node* curr, Node* prev, Node** head); // This function mainly calls reverseUtil() // with prev as NULL void reverse(Node** head) {  if (!head)  return;  reverseUtil(*head, NULL, head); } // A simple and tail-recursive function to reverse // a linked list. prev is passed as NULL initially. void reverseUtil(Node* curr, Node* prev, Node** head) {  /* If last node mark it head*/  if (!curr->næste) { *hoved = curr;  /* Update next to prev node */ curr->next = prev;  Vend tilbage;  } /* Gem curr->next node for rekursive call */ Node* next = curr->next;  /* og opdater næste ..*/ curr->next = prev;  reverseUtil(næste, curr, hoved); } // En hjælpefunktion til at oprette en ny node Node* newNode(int key) { Node* temp = (Node*)malloc(sizeof(Node));  temp->data = nøgle;  temp->næste = NULL;  retur temp; } // En hjælpefunktion til at udskrive en linket liste void printlist(Node* head) { while (head != NULL) { printf('%d ', head->data);  hoved = hoved->næste;  } printf('
'); } // Driverkode int main() { Node* head1 = newNode(1);  head1->next = newNode(2);  head1->next->next = newNode(3);  head1->next->next->next = newNode(4);  head1->next->next->next->next = newNode(5);  head1->next->next->next->next->next = newNode(6);  head1->next->next->next->next->next->next = newNode(7);  head1->next->next->next->next->next->next->next = newNode(8);  printf('Given linket liste
');  printliste(hoved1);  reverse(&head1);  printf('Omvendt linket liste
');  printliste(hoved1);  retur 0; } // Denne kode er bidraget af Aditya Kumar (adityakumar129)>

// Java program for reversing the Linked list class LinkedList {  static Node head;  static class Node {  int data;  Node next;  Node(int d)  {  data = d;  next = null;  }  }  // A simple and tail recursive function to reverse  // a linked list. prev is passed as NULL initially.  Node reverseUtil(Node curr, Node prev)  {  /*If head is initially null OR list is empty*/  if (head == null)  return head;  /* If last node mark it head*/  if (curr.next == null) {  head = curr;  /* Update next to prev node */  curr.next = prev;  return head;  }  /* Save curr->næste node for rekursivt opkald */ Node next1 = curr.next;  /* og opdater næste ..*/ curr.next = prev;  reverseUtil(next1, curr);  hovedet tilbage;  } // udskriver indhold af dobbelt linket liste void printList(Node node) { while (node ​​!= null) { System.out.print(node.data + ' ');  node = node.next;  } } // Driverkode public static void main(String[] args) { LinkedList list = new LinkedList();  list.head = ny Node(1);  list.head.next = ny node(2);  list.head.next.next = ny node(3);  list.head.next.next.next = ny node(4);  list.head.next.next.next.next = ny node(5);  list.head.next.next.next.next.next = ny node(6);  list.head.next.next.next.next.next.next = ny node(7);  list.head.next.next.next.next.next.next.next = ny node(8);  System.out.println('Given linket liste ');  liste.printList(hoved);  Node res = list.reverseUtil(head, null);  System.out.println('
Omvendt linket liste ');  list.printList(res);  } } // Denne kode er bidraget af Aditya Kumar (adityakumar129)>

# Simple and tail recursive Python program to # reverse a linked list # Node class class Node: # Constructor to initialize the node object def __init__(self, data): self.data = data self.next = None class LinkedList: # Function to initialize head def __init__(self): self.head = None def reverseUtil(self, curr, prev): # If last node mark it head if curr.next is None: self.head = curr # Update next to prev node curr.next = prev return # Save curr.next node for recursive call next = curr.next # And update next curr.next = prev self.reverseUtil(next, curr) # This function mainly calls reverseUtil() # with previous as None def reverse(self): if self.head is None: return self.reverseUtil(self.head, None) # Function to insert a new node at the beginning def push(self, new_data): new_node = Node(new_data) new_node.next = self.head self.head = new_node # Utility function to print the linked LinkedList def printList(self): temp = self.head while(temp): print (temp.data, end=' ') temp = temp.next # Driver code llist = LinkedList() llist.push(8) llist.push(7) llist.push(6) llist.push(5) llist.push(4) llist.push(3) llist.push(2) llist.push(1) print ('Given linked list') llist.printList() llist.reverse() print ('
Reversed linked list') llist.printList() # This code is contributed by Nikhil Kumar Singh(nickzuck_007)>

// C# program for reversing the Linked list using System; public class LinkedList {  Node head;  public class Node {  public int data;  public Node next;  public Node(int d)  {  data = d;  next = null;  }  }  // A simple and tail-recursive function to reverse  // a linked list. prev is passed as NULL initially.  Node reverseUtil(Node curr, Node prev)  {  /* If last node mark it head*/  if (curr.next == null) {  head = curr;  /* Update next to prev node */  curr.next = prev;  return head;  }  /* Save curr->næste node for rekursivt opkald */ Node next1 = curr.next;  /* og opdater næste ..*/ curr.next = prev;  reverseUtil(next1, curr);  hovedet tilbage;  } // udskriver indholdet af dobbelt linket liste void printList(Node node) { while (node ​​!= null) { Console.Write(node.data + ' ');  node = node.next;  } } // Driverkode offentlig statisk void Main(String[] args) { LinkedList list = new LinkedList();  list.head = ny Node(1);  list.head.next = ny node(2);  list.head.next.next = ny node(3);  list.head.next.next.next = ny node(4);  list.head.next.next.next.next = ny node(5);  list.head.next.next.next.next.next = ny node(6);  list.head.next.next.next.next.next.next = ny node(7);  list.head.next.next.next.next.next.next.next = ny node(8);  Console.WriteLine('Given linket liste ');  liste.printList(liste.hoved);  Node res = list.reverseUtil(list.head, null);  Console.WriteLine('
Omvendt linket liste ');  list.printList(res);  } } // Denne kode bidraget af Rajput-Ji>

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