So....

I _just_ want to use mod (N, 0.1) in a loop of #for(N, 0, 1, 0.02).

What's a good reliable way to implement an fmod() equivalent?
Do I need to write a macro, or is there a straightforward function (){} that I
can use?

Sorry to be grappling with "computer science math" again.
Thus, I return to the newusers section.  :|

Some of the values I get are "0", others are "0.1".
I'm challenged by the wide disparity between the two possibilities, and can't
get anything to work reliably, especially when I try to use the mod(A, B) result
in a select () statement.

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