githaven/docs/content/usage/actions/variables.en-us.md
Lunny Xiao f3cc00626b
Update actions variables documents (#30394)
Fix #30393

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Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Zettat123 <zettat123@gmail.com>
2024-04-11 11:57:03 +08:00

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---
date: "2024-04-10T22:21:00+08:00"
title: "Variables"
slug: "actions-variables"
sidebar_position: 25
draft: false
toc: false
menu:
sidebar:
parent: "actions"
name: "Variables"
sidebar_position: 25
identifier: "actions-variables"
---
## Variables
You can create configuration variables on the user, organization and repository level.
The level of the variable depends on where you created it. When creating a variable, the
key will be converted to uppercase. You need use uppercase on the yaml file.
### Naming conventions
The following rules apply to variable names:
- Variable names can only contain alphanumeric characters (`[a-z]`, `[A-Z]`, `[0-9]`) or underscores (`_`). Spaces are not allowed.
- Variable names must not start with the `GITHUB_` and `GITEA_` prefix.
- Variable names must not start with a number.
- Variable names are case-insensitive.
- Variable names must be unique at the level they are created at.
- Variable names must not be `CI`.
### Using variable
After creating configuration variables, they will be automatically filled in the `vars` context.
They can be accessed through expressions like `${{ vars.VARIABLE_NAME }}` in the workflow.
### Precedence
If a variable with the same name exists at multiple levels, the variable at the lowest level takes precedence:
A repository variable will always be chosen over an organization/user variable.