Template:E/doc

Usage
The e template is intended to facilitate and make uniform scientific notation numbers. To render
 * 3.14 × 10−12

instead of writing:
 *  3.14 × 10−12 

you can write:
 *  3.14−12 

which yields that same wikitext, and is therefore rendered the same.

Note that the parameter is text, not a number; it can include variables which can be italicized, etc. This also means that using a hyphen (-) and a minus sign (&minus;) with negative numbers gives different results.
 *  3.14-12  3.14 × 10-12
 *  3.14&amp;minus;12  3.14 × 10&minus;12
 *  3.14−12  3.14 × 10−12
 *  3.14z − y  3.14 × 10z − y