MATLAB: It’s a bug

Question

I discovered a potential bug and I want to report it:

Matlab R2018a windows 10

alfa=-0.0052+(61-1)*0.0001;

reasoning this is 0.0060-0.0052=0.0008=8e-04

so:

alfa2=8e-04;
isequal(alfa,alfa2)
ans
0

if you open alfa variable you can see:

8.000000000000004e-04

in fact if you round alfa:

alfa3=round(alfa,10);
isequal(alfa2,alfa3)
ans
1

That's all Thanks

Answer 1

It‘s called floating point comparison just search with the tag floating-point in this forum you will find lot of reasons

abs(alfa-alfa2)<1e-04