MATLAB: Finding odd and even values without functions

Question

Is it possible to identify if a value is even or odd using for loops instead of using a function (Ex. mod)? If possible, can someone show me?

Answer 1

What about dividing?

while 1
    a = a/2;
    if abs(a-1) < 0.01        % if very close to '1'
        disp('even')
        break;
    elseif a < 1              % if smaller than '1'
        disp('odd')
        break;
    end
end