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  1. Practice
  2. Data Structures
  3. Linked Lists
  4. Insert a node at the head of a linked list
  5. Discussions

Insert a node at the head of a linked list

  • kunal_tyagi + 5 comments

    Its working in C, try this out. All test case passed SinglyLinkedListNode* insertNodeAtHead(SinglyLinkedListNode* llist, int data) {

    SinglyLinkedListNode* temp = (SinglyLinkedListNode*)malloc(sizeof(SinglyLinkedListNode));
temp->data = data;
temp->next = NULL;

if(llist == NULL){
    llist = temp;
}else{
    temp->next = llist;
    llist = temp;
}
return llist;

    }

    • zakarh + 0 comments

      Stop with the comments. Let this comment thread die.

    • ch_krishnapriya + 0 comments

      I dont see a need for if condition here.

      SinglyLinkedListNode* temp = (SinglyLinkedListNode*)malloc(sizeof(SinglyLinkedListNode)); temp->data = data; temp->next = llist; return temp;

    • lavanyamanohar12 + 1 comment
      [deleted]
      • lavanyamanohar12 + 0 comments

        for c++, the following code worked, SinglyLinkedListNode *pNew= new SinglyLinkedListNode(data); if(llist == nullptr){ llist = pNew; }else{ pNew->next = llist; llist = pNew; } return llist;

    • dwivedihimanshu + 0 comments

      hi kunal, i have written same login in java but it is not working for me it is printing only last value of the node which is added, rest of the value is not printing so it is failing.

    • apdebian + 1 comment

      can u please give the solution of "Insert a Node at the Tail of a Linked List

      " using c.

      • apdebian + 0 comments

        https://www.hackerrank.com/challenges/insert-a-node-at-the-tail-of-a-linked-list/problem