The traversal of a graph refers to when you visit each of the vertices of a graph exactly once in a well-defined order. To ensure that each vertex of the graph is visited only once and to know which vertices have already been visited, the best way is to mark them. We will also look at how vertices are marked in this recipe.
Breadth-first traversal tends to create very short and wide trees. It operates by vertices in layers, that is, the vertices closest to the start are evaluated first, and the most distant vertices are evaluated last. Hence, it is referred to as the level-by-level traversal of the tree. The breadth-first traversal of a graph is very popularly used for finding the shortest path between two locations (vertices), that is, the path with the least number of edges. It is also used to find the linked pages...