# config-vars-referencing-vars (Vars Referencing Vars)

You can run this example with:

```bash
npx promptfoo@latest init --example config-vars-referencing-vars
cd config-vars-referencing-vars
```

## Usage

To get started, set your OPENAI_API_KEY environment variable.

Next, edit promptfooconfig.yaml.

Then run:

```bash
promptfoo eval
```

Afterwards, you can view the results by running `promptfoo view`