Python - Need help to understand how to call a function : <p>I am new to programming, and trying out with a little Python3.</p>

<p>I have some trouble understanding the concept behind calling a function? having the defined the following function, what would be the proper way to call it?</p>

<pre><code>def string_length(mystring):
return len(mystring)
</code></pre>

<p>Thanks in advance guys</p>
