SISMEMBER key member

Available since: 1.0.0

Time complexity: O(1)

ACL categories: @read @set @fast

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


Integer reply, specifically:

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


SADD myset "one" SISMEMBER myset "one" SISMEMBER myset "two"