SISMEMBER

SISMEMBER key member
Available since:
Redis Open Source 1.0.0
Time complexity:
O(1)
ACL categories:
@read, @set, @fast,
Compatibility:
Redis Software and Redis Cloud compatibility

Returns if member is a member of the set stored at key.

Required arguments

key

The name of the key that holds the set.

member

The member to check for.

Examples

redis> SADD myset "one"
(integer) 1
redis> SISMEMBER myset "one"
(integer) 1
redis> SISMEMBER myset "two"
(integer) 0

Redis Software and Redis Cloud compatibility

Redis
Software
Redis
Cloud
Notes
✅ Standard
✅ Active-Active
✅ Standard
✅ Active-Active

Return information

One of the following:

  • Integer reply: 0 if the element is not a member of the set, or when the key does not exist.
  • Integer reply: 1 if the element is a member of the set.
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