class Node: def __init__(self, data): self.data = data self.next = None def traverseAndPrint(head): currentNode = head while currentNode: print(currentNode.data, end=" -> ") currentNode = currentNode.next print("null") node1 = Node(7) node2 = Node(11) node3 = Node(3) node4 = Node(2) node5 = Node(9) node1.next = node2 node2.next = node3 node3.next = node4 node4.next = node5 traverseAndPrint(node1)