-2" aria-hidden="true" tabindex="-1"></a><span class="co">// ptr have type `*?i32`, instead of `?*i32`.</span></span>
<span id="cb21-3"><a href="#cb21-3" aria-hidden="true" tabindex="-1"></a><span class="kw">const</span> ptr = &amp;num;</span>
<span id="cb21-4"><a href="#cb21-4" aria-hidden="true" tabindex="-1"></a>_ = ptr;</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="sec-null-handling" class="level3" data-numb