MATLAB: Why are these different way of writing n shows different display of numbers

Question

>>a=0;b=1.2;h=0.1;n=((b-a)/h);

>> n=(b-a)/h;

>> for k=2:2:n;

disp(k)

end

     2
     4
     6
     8
    10

>> n=12;

>> for k=2:2:n;

disp(k)

end

     2
     4
     6
     8
    10
    12

Answer 1

http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F