Loosing? Learn the English language, people!

Not to be used to separate parentheses. Apparently used like this:

* in date ranges, such as 1849–1863,
* to join two names in a phrase, such as the Michelson–Morley experiment,
* in multi-part prefixes, such as "post–World War II", although for those, either a hyphen or an en dash can be used; British publications use hyphens, and American publications use en dashes.

https://en.wikipedia.org/wiki/Wikipedia:Hyphens_and_dashes

I've never seen the point of those. For me, the En dash isn't sufficiently distinct from a shorter hyphen.