SISMEMBER key member_value
This command is a predicate for whether or not a value is a member of a set that is associated with the given key.

  • If the `key` is associated with a value that is not a set, an error is raised.
  • If the `key` does not exist, its associated set is empty, and the command returns 0.
  • If the `member` belongs to the given set, an integer of 1 is returned.
  • Return Value

    Returns 1 if the specified member exists. Returns 0 otherwise.


    $ SADD yuga_world "America"
    $ SISMEMBER yuga_world "America"
    $ SISMEMBER yuga_world "Moon"

    See also

    sadd, scard, smembers, srem