% sample: switch
clear;clc;
idxc = 0 ;
while idxc < 1
    var1 = input('Do you want to learn matlb? Y/N \n','s'); % ????
switch var1 
    case 'Y'
        display('Matlab loves you.')
        idxc = 1;
    case 'N'
        display('You have no choice.')
    otherwise
        display('You are baffling.')
end
end