> For the complete documentation index, see [llms.txt](https://docs.adapptio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.adapptio.com/working-with-adapptio/how-to/action-logic.md).

# Action Logic

Actions represent a transformation layer that connects UI with integrations. Although actions can be used to implement simple back-end logic, the main purpose is to agregate and modify data.

To do that, you can use the `Output` node and write a simple expression, or you can use the `Transform` node where you can write JavaScript code.

Please see the following subpages for more information.