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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

  • alexjvalentino + 1 comment

    2 weeks later and it still isn't fixed.

    • saralbhagat0 + 1 comment

      still not fixed

      • shivaaprs + 1 comment

        still the same issue.

        • SutaxKapoor + 3 comments

          still not fixed

          • kunal_tyagi + 6 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

            • shashi1iitk + 0 comments

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

              return temp;

          • shubham1297kumar + 0 comments

            still not fixed

          • chhayaprakashj + 0 comments

            this code in c++ worked: -

            SinglyLinkedListNode* insertNodeAtHead(SinglyLinkedListNode* llist, int data) {

            //llist->next=NULL;
SinglyLinkedListNode *temp=new SinglyLinkedListNode(data);
if(llist==NULL){
    return new SinglyLinkedListNode(data);
}
else{
    temp->next=llist;
    temp->data=data;
    llist=temp;
}
return llist;

            }