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Breadth-first search facts for kids

Kids Encyclopedia Facts

In computer science, breadth-first search (BFS) is a method used for traversing a graph. It starts at any item you want to use as a starting position in a graph, and explores all of the neighbor items at the present depth before to moving on to the items at the next depth level. A breadth-first search done on a tree (data structure) is called a level-order traversal.

Animated BFS
Animated example of a breadth-first search (level-order traversal) within a tree.


void breadthFirstSearch(Item root) {
    Queue q = new Queue();
    root.found = true;
    while (!q.isEmpty()) {
        Item v = q.dequeue();
        for (Item neighbor : v.neighbors()) {
            if (!neighbor.found) {
                neighbor.found = true;

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Breadth-first search Facts for Kids. Kiddle Encyclopedia.