Is there a simple way to distinguish 0 from 0 in l3fp?
I had been aligning left in a table a column of sines, +0 or 0 followed
by decimal point & digits. By adding an \hphantom{} before the positive
numbers, they aligned nicely on the decimal point in the column, but
then along came 0. The simple conditional, "if !(number < 0) add
phantom", added the phantom and the column aligned like
0
0.5878
0
0.5878
etc.
In the absence of formatted printing of numbers, 0 is a problem. Even a
builtin test for 0 would ease matters, since in any kind of formatted
printing of numbers 0 and 0 will generally require different handling.
As it is, I've had to test each fp for whether it is zero; if it is I
convert to a tl variable and test whether that is 0. This is clumsy.
Hence my opening question.
Andrew

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