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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.
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It’s a hot topic among copy editors — in the US more than the UK.
https://www.nytimes.com/2019/08/14/style/em-dash-punctuation.html
To my ear, it has more of a dramatic beat to it than an en dash. Its slightly longer diving board lends a pause somewhere between a regular dash (en) and an ellipsis.
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I've never seen the point of those. For me, the En dash isn't sufficiently distinct from a shorter hyphen
Hyphens in most typefaces should be a bit shorter to be honest, as they often were in traditional typefaces. They're only ever used within words, rather than between ideas, so they do kinda serve a distinct purpose, but type designers for more modernist/humanist typefaces seem to disagree.
Ranges do also look a little nicer with en dashes too (e.g. 12th–23rd vs. 12th-23rd), especially in more traditional fonts like Baskerville
En dash?