Understanding cycle detection in a directed graph

A directed graph is one where all edges can only be traversed in one direction. Similar to an undirected graph, a cycle in a directed graph is a path that starts and ends at the same node, has no repeated edges, and has at least three nodes. Unlike undirected graphs, revisiting an already visited node is not sufficient to confirm the existence of a cycle. In this lesson, we will look at cycles in directed graphs and learn the algorithm that can be used to detect such cycles.

Algorithm