2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-shell" data-lang="shell"><span style="display:flex;"><span>import -&gt; const -&gt; var -&gt; init<span style="color:#f92672">()</span> -&gt; main<span style="color:#f92672">()</span>
</span></span></code></pre></div><h2 id="例子">
  例子
  <a class="anchor" href="#%e4%be%8b%e5%ad%90">#</a>
</h2>
<h3 id="包变量初始化">
  包变量初始化
  <a class="anchor" href="#%e5%8c%85%e5%8f%98%e9%87%8f%e5%88%9d%e5%a