SaddCommand: Contents
SADD _key_ _member_
Return value

# SaddCommand

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# SADD _key_ _member_

Time complexity O(1)

> Add the specified member to the set value stored at key. If memberis already a member of the set no operation is performed. If keydoes not exist a new set with the specified member as sole member iscreated. If the key exists but does not hold a set value an error isreturned.

## Return value

Integer reply, specifically:

    1 if the new element was added
    0 if the element was already a member of the set