-the cardinality (number of elements) of the set as an integer `>=` 0 if the operation succeeded
--2 if the specified key does not hold a set value
-</pre><h2><a name="See also">See also</a></h2>
-<ul><li> <a href="SremCommand.html">SREM</a></li><li> <a href="SismemberCommand.html">SISMEMBER</a></li><li> <a href="ScardCommand.html">SCARD</a></li><li> <a href="SmembersCommand.html">SMEMBERS</a></li><li> <a href="SinterCommand.html">SINTER</a></li><li> <a href="SinterstoreCommand.html">SINTERSTORE</a></li></ul>