🚀 go-pugleaf

First I wrote:

> I was wondering what is the preferred way of formatting
> numbers in exponential notation, e.g., -1.23e-4

Then I wrote:

> ... the most esthetically pleasing choice is
>
>	$-1.23 \times 10^{-4}$
>
> implemented by:
>
>	\newcommand\expnum[2]{\mbox{$#1 \times 10^{#2}$}}
>	\expnum{-1.23}{-4}
>
> The only drawback is readability of the source file --
> it's awkward having \expnum macros sprinkled in it --
> but I can certainly live with that.

Now I write:

The readability is easily fixed in Plain TeX with:

	\def\enum#1{\enumparse#1!}
	\def\enumparse#1e#2!{\mbox{$#1 \times 10^{#2}$}}
	\enum{-1.23e-4}

Now I am truly happy.  Thanks to Raymond Chen for this fine solution.

Andy