SismemberCommand: Contents
SISMEMBER _key_ _member_
Return value

# SismemberCommand

ï»¿#sidebar SetCommandsSidebar

# SISMEMBER _key_ _member_

Time complexity O(1)

> Return 1 if member is a member of the set stored at key, otherwise0 is returned.

## Return value

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 the key does not exist