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# 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, 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 are noted in the documentation.
///		
	All data transformation functions are only available in the expressions editor.

The [Cookbook](/code/cookbook/) contains examples for some common tasks, including some [Code node only](/code/cookbook/code-node/) functions.

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