> ## Documentation Index
> Fetch the complete documentation index at: https://docs.less.tech/llms.txt
> Use this file to discover all available pages before exploring further.

# Parameters

> A globally available variable store

Parameters is one of the features we love the most about Canvas. It allows you to create a variable that can be referenced in your model.

Imagine that you have a fixed exchange rate for your currency conversion and you want to use this rate in a bunch of different places in your model. You could create a parameter called 'exchange\_rate' and set it to the value of the exchange rate. Then you could reference this parameter in your model by using the parameter name. Instead of having to change it everywhere you use it, you can simply change it in the parameter and it will be updated everywhere.

Parameters can also be used to make your model more flexible and reusable. You could for instance dynamically load datasets with parameters and the [Directory](/tools/utilities/directory) tool and filter the datasets with parameters and the [Filter](/tools/basics/filter) tool.

### Using Parameters

Follow along in the demo below to see how you can use Parameters in your model.

<iframe src="https://demo.arcade.software/gnUOg2olil3mI6gOa9ua?embed&embed_mobile=tab&embed_desktop=inline&show_copy_link=true" title="Using Parameters" loading="lazy" allow="clipboard-write" />

You can also view the demo in full screen [here](https://app.arcade.software/share/gnUOg2olil3mI6gOa9ua).