solved using recursion

function printLinkedList(head) {``
   if(head === null) return;
   console.log(head.data)
   printLinkedList(head.next)

}

i cant delete the program in this page nor i can write new one what should i do in hackerrank

def printLinkedList(head):

current = head
while current is not None:
    print(current.data)
    current = current.next

void printLinkedList(SinglyLinkedListNode* head) {

auto current = head;
    while(current){
    std::cout << current->data << std::endl;
    current = current->next;
}

}

JavaScript (Node.js)

function printLinkedList(head) {
    while (head) {
        console.log(head.data);
        head = head.next;
    }
}