what does the following syntax do?

if ~isempty(Root_InPorts)
Root_InPorts  = get_param(Root_InPorts,'Name');
end
Num_Of_Root_InPorts  = numel(Root_InPorts);
Root_OutPorts = find_system(Search_Path,'SearchDepth',1,'BlockType','Outport');
if ~isempty(Root_OutPorts)
Root_OutPorts  = get_param(Root_OutPorts,'Name');
End 
Num_Of_Root_OutPorts = numel(Root_OutPorts);

Answer 1

[Monika Jaskolka]

I think there is a line missing at the beginning:

Root_InPorts = find_system(Search_Path,'SearchDepth',1,'BlockType','Inport');

This code counts the number of Inport blocks and Outport blocks in the first level of a Simulink model, and provides this info in the variables Num_Of_Root_InPorts and Num_Of_Root_OutPorts respectively.