Get the value of the specified key. If the key does not exist the special value 'nil' is
returned. If the value stored at key is not a string an error is returned because GET can only
handle string values.
<p>
Time complexity: O(1)
@param key
@return Bulk reply
Get the value of the specified key. If the key does not exist the special value 'nil' is returned. If the value stored at key is not a string an error is returned because GET can only handle string values. <p> Time complexity: O(1) @param key @return Bulk reply