The New Yorker‘s Mary Norris, author Between You & Me: Confessions of a Comma Queen, clarifies the difference between the hyphen (-), the en dash (–), and the em dash (—):
Books, Design and Culture
The New Yorker‘s Mary Norris, author Between You & Me: Confessions of a Comma Queen, clarifies the difference between the hyphen (-), the en dash (–), and the em dash (—):