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SISMEMBER

Last updated 
SISMEMBER key member
Group
Set
Complexity
O(1)
Arity
3 (exactly, counting the command name)
Flags
read-only, fast
Keys
first 1, last 1, step 1
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SISMEMBER tells you whether member is in the set stored at key. To check several members in one call, use SMISMEMBER.

Return value

Section titled “Return value”
Case RESP2 RESP3
Member of the set Integer 1 Same
Not a member, or key does not exist Integer 0 Same

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

Examples

Section titled “Examples”
127.0.0.1:6379> SADD tags "redis"
(integer) 1
127.0.0.1:6379> SISMEMBER tags "redis"
(integer) 1
127.0.0.1:6379> SISMEMBER tags "mysql"
(integer) 0

Compatibility

Section titled “Compatibility”

Same as Redis 7.4 and Valkey 8.

See also

Section titled “See also”

SMISMEMBER, SMEMBERS, SADD