ZcardCommand: Contents
ZCARD _key_ (Redis >
Return value

# ZcardCommand

ï»¿#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.

## Return value

Integer reply, specifically:

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