SCARD

SCARD returns the number of members (the cardinality) of the set stored at key.

Return value

Case	RESP2	RESP3
Set exists	Integer: the number of members	Same
Key does not exist	Integer 0	Same

SCARD replies with a WRONGTYPE error if key holds a value that is not a set.

Examples

127.0.0.1:6379> SADD tags "redis" "cache" "db"
(integer) 3
127.0.0.1:6379> SCARD tags
(integer) 3
127.0.0.1:6379> SCARD nosuchkey
(integer) 0

Compatibility

Same as Redis 7.4 and Valkey 8.

See also

SMEMBERS, SINTERCARD, SADD