What are the parameters for the number Pipe - Angular 2
<p>I have used the number pipe below to limit numbers to two decimal places.</p>

<pre><code>{{ exampleNumber | number : '1.2-2' }}
</code></pre>

<p>I was wondering what the logic behind '1.2-2' was? I have played around with these trying to achieve a pipe which filters to zero decimal places but to no avail.</p>