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# Depth-First Search (DFS)
Depth-first search (DFS) is an algorithm for traversing or
searching tree or graph data structures. One starts at
the root (selecting some arbitrary node as the root in
the case of a graph) and explores as far as possible
along each branch before backtracking.
Depth-first search (DFS) is an algorithm for traversing graph data structures. The search starts at the tree root or some arbitrary node of a graph. The search explores a branch of nodes until reaching a terminal node before backtracking to explore another branch of nodes.
![Algorithm Visualization](https://upload.wikimedia.org/wikipedia/commons/7/7f/Depth-First-Search.gif)