# About as\_number filter

The `as_number` Jinja filter will coerce Jinja-compiled output into a numeric value (integer or float), or return an error if it cannot be represented as a number.

### Usage

In the example below, the `as_number` filter is used to coerce an environment variables into a numeric value to dynamically control the connection port.

profiles.yml

```yml
my_profile:
  outputs:
    dev:
      type: postgres
      port: "{{ env_var('PGPORT') | as_number }}"
```

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