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<b>ZcardCommand: Contents</b><br>&nbsp;&nbsp;<a href="#ZCARD _key_ (Redis &gt;">ZCARD _key_ (Redis &gt;</a><br>&nbsp;&nbsp;&nbsp;&nbsp;<a href="#Return value">Return value</a>
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<h1 class="wikiname">ZcardCommand</h1>
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&iuml;&raquo;&iquest;#sidebar <a href="SortedSetCommandsSidebar.html">SortedSetCommandsSidebar</a><h1><a name="ZCARD _key_ (Redis &gt;">ZCARD _key_ (Redis &gt;</a></h1> 1.1) =
<i>Time complexity O(1)</i><blockquote>Return the sorted set cardinality (number of elements). If the <i>key</i> does notexist 0 is returned, like for empty sorted sets.</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">
the cardinality (number of elements) of the set as an integer.
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