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< b > ZcardCommand: Contents< / b > < br > < a href = "#ZCARD _key_ (Redis >" > ZCARD _key_ (Redis > < / a > < br > < a href = "#Return value" > Return value< / a >
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< h1 class = "wikiname" > ZcardCommand< / h1 >
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ï » ¿ #sidebar < a href = "SortedSetCommandsSidebar.html" > SortedSetCommandsSidebar< / a > < h1 > < a name = "ZCARD _key_ (Redis >" > ZCARD _key_ (Redis > < / a > < / h1 > 1.1) =
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< 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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