ZCARD

Syntax

1. ZCARD key

Time complexity: O(1)

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

Return

Integer reply: the cardinality (number of elements) of the sorted set, or 0 if key does not exist.

Examples

1. dragonfly> ZADD myzset 1 "one"
2. (integer) 1
3. dragonfly> ZADD myzset 2 "two"
4. (integer) 1
5. dragonfly> ZCARD myzset
6. (integer) 2