Question

Given a singly linked list and an element K, your task is to insert the element at the tail of the linked list.

Input

User Task:

Since this will be a functional problem, you don't have to take input. You just have to complete the function addElement() that takes head node and the integer K as a parameter.

Constraints:

1 <=N<= 1000

1 <=K, value<= 1000

Output

Return the head of the modified linked list

Answer 1

public class Main {
    public static Node addElement(Node head, int k) {
        if (head == null) {
            head = new Node(k);
        } else {
            Node node = head;
            while (node.next != null) {
                node = node.next;
            }
            node.next = new Node(k);
        }
        return head;
    }
}