Understanding iterative preorder traversal

To understand the iterative implementation of preorder traversal, we need to split the whole process into small steps and understand how each step functions. Once we get the intuition behind these individual steps, we can connect them to devise an algorithm for iterative preorder traversal. Let us start by looking at how preorder traversal is done. 

• Step 1: Visit the node.
• Step 2: Recursively traverse the node's `left` subtree.
• Step 3: Recursively traverse the node's `right` subtree.

Iterative Steps