> For the complete documentation index, see [llms.txt](https://idt-nida.gitbook.io/developer-guideline/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://idt-nida.gitbook.io/developer-guideline/collaboration-agreement/naming-convention/naming-convention-for-environment-variable.md).

# Naming Convention for Environment Variable

แนวทางการตั้งชื่อสำหรับ environment variable (.env) ตามข้อตกลงร่วมกัน

<table><thead><tr><th width="299">File Name</th><th>Description</th></tr></thead><tbody><tr><td><code>.env</code></td><td>Default environment file for local development.</td></tr><tr><td><code>.env.example</code></td><td>Sample template for environment variables.</td></tr><tr><td><code>.env.testing</code></td><td>Environment file for automated tests.</td></tr><tr><td><code>.env.production</code></td><td>Environment file for production.</td></tr><tr><td><code>.env.staging</code></td><td>Environment file for staging.</td></tr><tr><td><code>.env.local</code></td><td>Additional local environment file to override <code>.env</code>.</td></tr><tr><td><code>.env.development</code></td><td>Environment file for development.</td></tr><tr><td><code>.env.ci</code></td><td>Environment file for continuous integration (CI) builds.</td></tr></tbody></table>