[Ignore. I just noticed that both expressions are completely constant.]

So aside from the output precision issues, a root problem is creating an NV in the first place?

Not quite.

The root problem is trying to store a number that's periodic in binary into a floating point number. 

                 ____________________
0.16 base 10 = 0.00101000111101011100 base 2

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That means that it can't be stored exactly as a float. (Obviously, it can't be stored exactly as an integer either.)

The compiler apparently uses an alternate means of calculating 1000*(4/25) such that it produces exactly 160. Whether that's stored as an IV, UV or NV is irrelevant.

In reply to Re^5: Integers sometimes turn into Reals after substraction (printed accuracy and float subtraction) by ikegami
in thread Integers sometimes turn into Reals after substraction by rduke15

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