:
      <span class="hljs-keyword">raise</span> <span class="hljs-type">ValueError</span>.newException &amp;<span class="hljs-string">&quot;invalid character: </span><span class="hljs-meta">\'</span><span class="hljs-string">{c}</span><span class="hljs-meta">\'</span><span class="hljs-string">&quot;</span>

<span class="hljs-keyword">func</span> `$`(n: <span class="hljs-type">Number</span>): <span class="hljs-built_in">string</span> =
  <span class="hljs-keyword">var</span> left: <span class="hljs-built_in"