Redis ZCARD Command

Redis Sorted Sets (sorted set)

The Redis ZCARD command is used to calculate the number of elements in a set.

Syntax

Basic Syntax of Redis ZCARD Command

redis　127.0.0.1:6379> ZCARD KEY_NAME

Available Version

>= 1.2.0

Return Value

Returns the cardinality of the sorted set when the key exists and is of the sorted set type. Returns 0 when the key does not exist.

Online Examples

redis> ZADD myzset　1　"one"
(integer)　1
redis> ZADD myzset　2　"two"
(integer)　1
redis> ZCARD myzset
(integer)　2
redis>

Redis Sorted Sets (sorted set)