Example of pre order traversal, Data Structure & Algorithms

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Example of pre order traversal: Reading of a book, since we do not read next chapter unless we complete all sections of previous chapter & all its sections.

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Figure : Reading a book : A preorder tree traversal

As each of nodes is traversed only once, the time complexity of preorder traversal is T(n) = O(n), where n is number of nodes in the tree.

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