How to define a criteria for output arguments of a function?

Consider a sample code schematic as shown below: The following function has 2 options, 1st option will deliver 2 output argurments(d,e) and second option delivers only 1 output argument (f). So what shold I write in the function(........? here?), so that if option 1 is selected 2 outputs are returned and when option 1 is selction only 1 output is returned.

function() = operation(a,b,c,'option')
 
if option ==1
     d = a+b;
     e= b+c;
 end
     
 if option == 2
         f = a+b+c
 end


end

Answer 1

[Voss]

One way:

function [d,e] = operation(a,b,c,option)

if option == 1
    d = a+b;
    e = b+c;
end

if option == 2
    d = a+b+c;
    e = [];
end

end

Another way:

function varargout = operation(a,b,c,option)

if option == 1
    d = a+b;
    e = b+c;
    varargout = {d,e};
end

if option == 2
    f = a+b+c;
    varargout = {f};
end

end