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The four hyphen/dash-like characters used in Wikipedia are: - is a hyphen-minus (ASCII 2D, Unicode 002D), normally used as a hyphen, or in math expressions as a minus sign – is an en dash (Unicode 2013). This can also be entered from the Special characters: Symbols bar above the text-entry field; it's between the m³ and —
The hyphen ‐ is a punctuation mark used to join words and to separate syllables of a single word. The use of hyphens is called hyphenation. [1]The hyphen is sometimes confused with dashes (en dash –, em dash — and others), which are wider, or with the minus sign −, which is also wider and usually drawn a little higher to match the crossbar in the plus sign +.
This essay explains use of the non-breaking hyphen character ‑, U+2011, coded by ‑ or ‑.Once displayed in a page, the non-breaking hyphen can be copied into words, or abbreviations, so they will not wrap at the hyphen character, such as an interstate highway symbol, "I‑94", which would always wrap to the next line as a whole word.
A hyphenation algorithm is a set of rules, especially one codified for implementation in a computer program, that decides at which points a word can be broken over two lines with a hyphen. For example, a hyphenation algorithm might decide that impeachment can be broken as impeach-ment or im-peachment but not impe-achment .
The thing on your keyboard next to the zero key is actually a hyphen-minus (Unicode U+002D), and not (typographically) either a proper hyphen (U+2010) or a minus (U+2212). Subject to the vagaries of the fonts you have installed, you should see that &$8208; (the "real" U+2010 hyphen) has the same appearance as &$8209; (U+2011) non-breaking hyphen.
It specifies where it would be OK to add a line-break where a word is too long, or it is perceived that the browser will break a line at the wrong place. Whether the line actually breaks is then left up to the browser. The break will look like a space - see soft hyphen below when it would be more appropriate to break the word or line using a ...
One of his most influential and ground-breaking papers was "A technique for computer detection and correction of spelling errors" published in 1964. [2] He also developed and patented for IBM the first algorithm for placing hyphens automatically in words. In 1971 he published the book "Markov Models and Linguistic Theory : An Experimental Study ...
The double hyphen was never used in typography because typeset fonts, like the digital fonts used on computers, include em dashes. New: The double hyphen ("--"), used by some writers to represent an em dash, is not used on Wikipedia. The double hyphen is a carry-over from the typewriter, which does not have an em-dash key.