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<b>ExistsCommand: Contents</b><br> <a href="#EXISTS _key_">EXISTS _key_</a><br> <a href="#Return value">Return value</a>
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<h1 class="wikiname">ExistsCommand</h1>
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#sidebar <a href="GenericCommandsSidebar.html">GenericCommandsSidebar</a><h1><a name="EXISTS _key_">EXISTS _key_</a></h1>
<i>Time complexity: O(1)</i><blockquote>Test if the specified key exists. The command returns"0" if the key exists, otherwise "1" is returned.Note that even keys set with an empty string as value willreturn "1".</blockquote>
<h2><a name="Return value">Return value</a></h2><a href="ReplyTypes.html">Integer reply</a>, specifically:<br/><br/><pre class="codeblock python" name="code">
1 if the key exists.
0 if the key does not exist.
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