C# float magically changing value

Question

I have a float holding a very important value, which has to be VERY exact.
The problem I have is I\'m changing the value of the float ALWAYS only + and - (No divisi

Answer 1

Just like an int variable can only hold integers in a certain range, a float can only hold certain values. 0.05 is not one of them.

If you set an int variable to (say) 3.4, it won't actually hold the value 3.4; it will hold that value converted to a representable int value: 3.

Similarly, if you set a float variable to 0.05, it won't get that exact value; it will instead get that value converted to the closest value representable as a float. This is what you are seeing.