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+ +ZcardCommand: Contents
  ZCARD _key_ (Redis >
    Return value +
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ZcardCommand

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+ #sidebar SortedSetCommandsSidebar

ZCARD _key_ (Redis >

1.1) = +Time complexity O(1)
Return the sorted set cardinality (number of elements). If the key does notexist 0 is returned, like for empty sorted sets.
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Return value

Integer reply, specifically:

+the cardinality (number of elements) of the set as an integer.
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