MATLAB: Is it a bug

floating pointfor loopif statementMATLAB

I found a weird situation with the number "1.4"
v=0:0.01:5;
vd=1.4;
a=0;
for i=1:length(v)
    if v(i)==vd
        a=1
    end
    
end
This code doesn't make the value of "a" become "1." However, if I change the value of "vd" to any other numbers (eg. vd=1.5), this code works well. Also, if I change the range of "v" to "v=0:0.01:2", it works as well. I don't know what's wrong with my orignal codes. Can anyone help me? Thank you very much!

Best Answer

You have encountered ‘floating-point approximation error’.
See Floating-Point Numbers for an extended discussion.
Also see colon for an explanation of how it calculates the numbers in your ‘v’ vector.
Related Question