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---
name: Set environment variables
---
The current environment variables can be accessed via `process.env` or `Bun.env`.
```ts
Bun.env.API_TOKEN; // => "secret"
process.env.API_TOKEN; // => "secret"
```
---
Set these variables in a `.env` file.
Bun reads the following files automatically (listed in order of increasing precedence).
- `.env`
- `.env.production` or `.env.development` (depending on value of `NODE_ENV`)
- `.env.local`
```txt#.env
FOO=hello
BAR=world
```
---
Variables can also be set via the command line.
```sh
$ FOO=helloworld bun run dev
```
---
See [Docs > Runtime > Environment variables](/docs/cli/run#environment-variables) for more information on using environment variables with Bun.
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