ZCARD

Returns the number of members in a sorted set.

Usage: ZCARD key
Complexity: O(1)
Since: 1.2.0
ACL Categories: @fast, @read, @sortedset
Command flags: READONLY, FAST

Returns the sorted set cardinality (number of elements) of the sorted set stored at key.

Examples

127.0.0.1:6379> ZADD myzset 1 "one"
(integer) 1
127.0.0.1:6379> ZADD myzset 2 "two"
(integer) 1
127.0.0.1:6379> ZCARD myzset
(integer) 2

Replies

RESP2

Integer reply: the cardinality (number of members) of the sorted set, or 0 if the key doesn't exist.

RESP3

Integer reply: the cardinality (number of members) of the sorted set, or 0 if the key doesn't exist.