Because I won't remember this:

From a brief article on typography:

Hyphens are the most bastardized character in design. The shortest of the group—hyphens—are for hyphenating compound words or words over line breaks. It’s slightly bigger brother, the en-dash, is used to describe a range, as in “1865–1904.” The em-dash rings in as the heavyweight champ of the three and is used as a graceful pause or interjection in a sentence. And do remember the golden rule: two hyphens don’t make an em-dash. En-dash: Mac (opt+hyphen), Windows (alt+0150), HTML (–) Em-dash: Mac (opt+shift+yphen), Windows (alt+0151), HTML (—)

Good to know. ----- Listening to: Franklin's Tower gd1983-09-02