0.41==0.4+1*0.01 is False but 0.31==0.3+1*0.01 is True??

Hi all, My friend encountered this interesting question in matlab. In command windows, compute 0.41==0.4+1*0.01, ans=0 compute 0.31==0.3+1*0.01, ans=1 compute 0.51==0.5+1*0.01, ans=1 ... Does anyone know the reason? Thank you very much

Answer 1

[Wayne King]

Hi Zhizheng,

http://www.mathworks.com/matlabcentral/answers/69-why-does-1-2-3-1-3-not-equal-zero

Answer 2

[Jan]

This effect is an evergreen in the FAQ. It is strongly recommended to read the FAQ, because it allows to learn from the problems of others.