ils literal notranslate"><span class="pre">&lt;substring&gt;</span></code> is not found, a position of -1 is
returned.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">string(FIND)</span></code> subcommand treats all strings as ASCII-only characters.
The index stored in <code class="docutils literal notranslate"><span class="pre">&lt;output_variable&gt;</span></code> will also be counted in bytes,
so strings containing multi-byte characters may lead to unexpected results.</p>
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