Flowcharts & Processes

How the A* Pathfinding Algorithm Works

Flowcharts & Algorithms diagram · made in Skemio

Flowchart of the A* algorithm showing priority queue initialization, extracting lowest cost node, checking goal condition, and updating neighbor costs.
Flowchart of the A* algorithm showing priority queue initialization, extracting lowest cost node, checking goal condition, and updating neighbor costs.
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What it shows

  • Combines actual cost g(n) with heuristic estimated cost h(n).
  • Admissible heuristics guarantee finding the true shortest path.
  • Min-priority queues keep exploration focused strictly on optimal paths.

The takeaway

A* guarantees the shortest path efficiently by steering exploration toward the target heuristic.

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