What is the primary purpose of the 'visited' array in Dijkstra's algorithm?

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Q: What is the primary purpose of the 'visited' array in Dijkstra's algorithm?

Solution: The 'visited' array in Dijkstra's algorithm is used to keep track of which vertices have been processed to avoid reprocessing them.

Steps: 6

Step 1: Understand that Dijkstra's algorithm is used to find the shortest path in a graph.
Step 2: Know that a graph consists of vertices (points) and edges (connections between points).
Step 3: Realize that during the algorithm, we need to check each vertex to find the shortest path.
Step 4: The 'visited' array is created to keep track of which vertices we have already checked.
Step 5: When a vertex is processed (checked), we mark it as 'visited' in the array.
Step 6: By using the 'visited' array, we avoid checking the same vertex multiple times, which makes the algorithm more efficient.