Implement recursive algorithms with sub-workflows: Towers of Hanoi demo
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Nodes used (6)
- Edit Fields (Set)
n8n-nodes-base.set - If
n8n-nodes-base.if - Execute Sub-workflow
n8n-nodes-base.executeWorkflow - Execute Workflow Trigger
n8n-nodes-base.executeWorkflowTrigger - Code
n8n-nodes-base.code - Manual Trigger
n8n-nodes-base.manualTrigger
What it does
How it works This is an example of using sub-workflow nodes and a proof of concept showing that it’s possible to solve and explain recursive problems with n8n. Towers of Hanoi - Task Move a stack of n disks from rod A to rod C, using rod B as auxiliary. Only one disk can be moved at a time, and no disk may be placed on a smaller disk. Example n=4 | | | = | | === | | ===== | | ======= | | --------- --------- --------- A B C Algorithm procedure Hanoi(n, X, Y, Z): if n == 1: move disk from X to Z else: Hanoi(n-1, X, Z, Y) move disk from X to Z Hanoi(n-1, Y, X, Z) Notes - This is a learning example. In a real scenario, you would probably use an iterative approach with only a single code node. - When experimenting with recursion, make sure to define a termination condition first. Also, be aware of the "Restart workspace" link in the n8n Dashboard. - Learn more about Recursion on Wikipedia&oldid=1301600240TowersofHanoi). Set up steps - Optional: Set "numberOfDiscs" in node "Set number of discs" - Execute workflow