ark the <code>num</code> object as optional, instead of the pointer object. If we do that, then, the pointer object is not optional anymore. It would be a similar (although different) result. Because then, we would have a pointer to an optional value. In other words, a pointer to a value that is either a null value, or, a not-null value.</p>
<p>In the example below, we are recreating this idea. Now, the <code>ptr</code> object have a data type of <code>*?i32</code>, instead of <code>?*i32</code>. Notice tha