Understanding depth first traversal

Unlike linear data structures, we cannot traverse all nodes in a graph using simple loops. The depth-first traversal is a fundamental traversal algorithm for graph data structures that uses depth-first search to visit all nodes connected to a node. The depth-first search is a recursive algorithm that starts from a node and explores one complete branch at a time. As we will see later, the depth-first traversal algorithm makes multiple depth-first searches from different sources to traverse all the nodes in a graph.

Algorithm