| pre-order traversal, with recursion: | |
| 35 28 20 25 23 26 30 60 70 65 64 68 | |
| pre-order traversal, without recursion: | |
| 35 60 70 | |
| in-order traversal, with recursion: | |
| 20 23 25 26 28 30 35 60 64 65 68 70 | |
| in-order traversal, without recursion: | |
| 28 30 35 60 65 68 70 |