> For the complete documentation index, see [llms.txt](https://docs.stackai.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stackai.com/workflow-builder/utils-logic-and-others.md).

# Utils, Logic, and Others

This section covers utility nodes for data processing, logic nodes for controlling workflow flow, and bonus features for advanced use cases.

Use these nodes to add branching, loops, code execution, and other programmatic control to your workflows.

### In this section

<table data-view="cards"><thead><tr><th>Topic</th><th data-card-target data-type="content-ref">Page</th></tr></thead><tbody><tr><td><strong>Utils</strong><br>Helper nodes for common data tasks — custom API calls, shared memory, delays, and more.</td><td><a href="/spaces/FSlso1Kjob5CLDrh0dVn/pages/Zof3etLdRGP6MmrBNvi8">/spaces/FSlso1Kjob5CLDrh0dVn/pages/Zof3etLdRGP6MmrBNvi8</a></td></tr><tr><td><strong>Logic</strong><br>Control flow nodes — conditionals, loops, routing, and code execution.</td><td><a href="/spaces/FSlso1Kjob5CLDrh0dVn/pages/jTibWaU8CBxAS1LD4AsN">/spaces/FSlso1Kjob5CLDrh0dVn/pages/jTibWaU8CBxAS1LD4AsN</a></td></tr><tr><td><strong>Bonus Features</strong><br>Additional workflow tools including sharing, skipping, and replacing nodes.</td><td><a href="/spaces/FSlso1Kjob5CLDrh0dVn/pages/YgEf5lz1TntnvwDC7GW4">/spaces/FSlso1Kjob5CLDrh0dVn/pages/YgEf5lz1TntnvwDC7GW4</a></td></tr></tbody></table>

### Start with what your workflow needs

* Need to branch based on a condition? Start with [**If/Else Node**](/workflow-builder/utils-logic-and-others/logic/if-else-node.md).
* Need to run custom code? Use [**Code Node**](/workflow-builder/utils-logic-and-others/logic/code-node.md)**.**
* Need to call an external API? Use [**Custom API**](/workflow-builder/utils-logic-and-others/utils/custom-api.md).
* Need to iterate over a list? Use [**Loop Subflow**](/workflow-builder/utils-logic-and-others/logic/loop-subflow.md).


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