Let us create binary tree shown in above diagram
root = newNode ( 1 ) NEW_LINE root . left = newNode ( 2 ) NEW_LINE root . right = newNode ( 3 ) NEW_LINE root . left . left = newNode ( 4 ) NEW_LINE root . left . right = newNode ( 5 ) NEW_LINE root . left . right . left = newNode ( 6 ) NEW_LINE print ( " Height ▁ of ▁ tree ▁ is " , heightOfTree ( root ) ) NEW_LINE