# Use Tera filters (length)

* Tera
* length

* The Tera template system comes with a number of [filters](https://keats.github.io/tera/docs/#filters)
* List of [built-in filters](https://keats.github.io/tera/docs/#built-in-filters)

this is a simple example using the `length` filter:

{% embed include file="src/examples/rocket/use-tera-filter/templates/index.html.tera" %}

{% embed include file="src/examples/rocket/use-tera-filter/src/main.rs" %}
{% embed include file="src/examples/rocket/use-tera-filter/src/tests.rs" %}
{% embed include file="src/examples/rocket/use-tera-filter/Rocket.toml" %}


