Strange result with floating point addition

Question

Why is it when I print/display the result of

eval(\"11.05\") + eval(\"-11\")

it comes out as 0.05000000000000071 instead of the expecte

Answer 1

This has nothing to do with eval (which you should avoid).

You get the same problem with 11.05 - 11.

This is just the usual floating point problem