En and em dashes—the difference and how to make them
—This is an em dash. It is the width of a capital M. –This is an en dash. It is the width of a capital N. -This is a hyphen. It is the width of... er... a hyphen. The hyphen is not a dash. It's a hyphen—used to hyphenate things; intra-word punctuation, generally. It is [...]