C# strange behavior with + operator [duplicate]

Question

Can anyone tell me why the following statement evaluates to false?

bool myBoolean = .6 + .3 + .1 == .1 + .3 + .6; // false

It does the same thing in Javascript and C++.

Answer 1

_{Nb. I'm answering this question since it is also tagged C++}

Due to float representation errors, in C++ the above yields false since the two float numbers aren't perfectly equal.

E.g. the internal representation for 0.1 is close to that value, but not exactly it

The same holds for C#.

Allow me to link a famous document that (imho) every programmer dealing with floating point arithmetic should read: What Every Computer Scientist Should Know About Floating-Point Arithmetic