| #https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4 | |
| description: n8n's built-in custom methods and variables. | |
| contentType: overview | |
| # Built-in methods and variables | |
| n8n provides built-in methods and variables for working with data and accessing n8n data. This section provides a reference of available methods and variables for use in [expressions](/glossary.md#expression-n8n), with a short description. | |
| /// note | Availability in the expressions editor and the Code node | |
| Some methods and variables aren't available in the Code node. These aren't in the documentation. | |
| All data transformation functions are only available in the expressions editor. | |
| /// | |
| The [Cookbook](/code/index.md) contains examples for some common tasks, including some [Code node only](/code/cookbook/code-node/index.md) functions. | |
| [[% import "_macros/section-toc.html" as sectionToc %]] | |
| [[ sectionToc.sectionToc(page) ]] | |