o use the alternative value, which is the number 15.</p>
<div class="cell">
<div class="sourceCode cell-code" id="cb24"><pre class="sourceCode zig code-with-copy"><code class="sourceCode zig"><span id="cb24-1"><a href="#cb24-1" aria-hidden="true" tabindex="-1"></a><span class="kw">const</span> x: ?<span class="dt">i32</span> = <span class="cn">null</span>;</span>
<span id="cb24-2"><a href="#cb24-2" aria-hidden="true" tabindex="-1"></a><span class="kw">const</span> dbl = (x <span class="kw">orelse</span> <sp