How can I give user defined Yes No for multiple set of code?

%Enter Initial coordinates as Matrix for triangle u = input('Enter the triangle Matrix:\n');

%Enter Initial coordinates as Matrix for quadrilateral u = input('Enter the quadrilateral Matrix:\n');

For these two, I want to create a Yes/No command. For case one if a user gives yes then ask for traingle matrix. If no then ask the user for second case which is quadrilateral matrix. I don't want infinite loop. Please help?

Answer 1

[Dennis]

a=input('Do you like triangles? Y/N','s');
if strcmpi(a,'y')
    %triangles
   elseif strcmpi(a,'n')
    %no triangles
end