how to copy list - iterative

How to copy list - iterative

public static Node copySinglyLinkedListNextOnly(Node root)  // 1 -> 2 -> 3 -> 4, return copyRoot value 1
{
// ---
  Node newRoot = ;
  while( root!= null ){ // 1 //2
      newRoot = new Node(root.val);// newroot=1
      
      
      
      // new node for next
      Node next =null;
      if(root.next != null){
        next = new Node(root.next.val);  
      }
      newRoot.next = next; // should point new root with value 1 -> node 2
      
      //newRoot.next = root.next;// 1->2  ? new list - should point new root with value 1 -> node 2
      root = root.next; // root=2  
      
      newRoot = newRoot.next;  // newRoot.next -> have not created yet! 
    
    
    --- Julia showed how she solved. 
    // - - empty list -> one node -> more than one node -> delegate the task
    if(root == null)  // empty list
      return null;
      
    var copyRoot = new Node(root.Value);
    
    var copyChildRoot = copySinglyLinkedListNextOnly(root.Next);
    
    copyRoot.next = copyChildRoot;
    
    return copyRoot;     // list only has one node
  }