Incorrect significant figure rounding

[Markos-Th09]

When rounding using significant figures, the number is truncated instead of being rounded. For example

12.9 to 2 sf

outputs 12 instead of 13

[printfn]

Thanks for the report, this would definitely be good to fix.

[Markos-Th09]

also to <n> dp is also truncating but I don't what is the intended behavior of that

[BoolPurist]

@printfn Do you intent to fix it by yourself in the near future ?

If not.
I would be willing to fix it. However, after looking into the code for that, I came to the conclusion that making sf rounding work will take me a while to get it right.

What are thoughts about it ?

[Markos-Th09]

@printfn also should regular rounding be preferred over to truncation for the to dp rounding mode? If so, should a truncation rounding mode be introduced?

[printfn]

I think both to dp and to sf should round correctly. Supporting optional truncation would be nice too, but less important than getting the rounding right.