an aria-hidden="true" class="line-numbers-rows"><a href="#C1_L1" id=C1_L1></a></span></code></pre>
<p>Let's now implement the helper. Helpers are functions that take
one or more inputs and return a single output that should be put into
the HTML.</p>
<p>To add a new helper, create a file with the name of the helper you want
(e.g. <code>format-currency.js</code>) in your application's <code>helpers</code> directory.
You can also have Ember generate the file for you from the command line:</p>
<pre class="langu