um: ?<span class="dt">i32</span> = <span class="dv">5</span>;</span>
<span id="cb19-2"><a href="#cb19-2" aria-hidden="true" tabindex="-1"></a>num = <span class="cn">null</span>;</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="optional-pointers" class="level3" data-number="6.4.2">
<h3 data-number="6.4.2" class="anchored" data-anchor-id="optional-pointers"><span class="header-section-number">6.4.2</span> Optional po