function help(topic)
% Copyright 2005-2016 The MathWorks, Inc.

msg = '';
if nargin > 0 && ...
        ((ischar(topic) && isrow(topic)) || ...
        (isstring(topic) && isscalar(topic))) && ...
        strlength(topic) > 0
    
    msg = getString(message('MCR:help:Topic',char(topic)));
end

warning(message('MCR:help:NoHelp', msg));
