May 2017
Intermediate to advanced
340 pages
8h 16m
English
Content preview from PHP 7 Data Structures and Algorithms
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Pre-order
In pre-order traversal, the root node is visited first, followed by the left node and then the right node. The principles of pre-order traversal are as follows:
- Display the data part of the root (or current node).
- Traverse the left subtree by recursively calling the pre-order function.
- Traverse the right subtree by recursively calling the pre-order function.
The preceding tree will have F, B, A, D, C, E, G, I, and H as output as it is being traversed in pre-order.
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