Driver program to test above function
root = Node ( 10 ) NEW_LINE root . left = Node ( 8 ) NEW_LINE root . right = Node ( 2 ) NEW_LINE root . left . left = Node ( 3 ) NEW_LINE root . left . right = Node ( 5 ) NEW_LINE root . right . left = Node ( 2 ) NEW_LINE iterativePreorder ( root ) NEW_LINE