A dash is a punctuation mark. It is longer than a hyphen and is used differently.Common dashesThere are several forms of dash, of which the most common are:HyphenThe hyphen is used both to join words and to separate syllables. Strictly speaking, the hyphen is not a dash at all; thus, careful typesetting (including with modern computer applications, such as word processors and HTML) relies on the following proper dashes instead.Figure dashThe figure dash is so named