On a standard keyboard, the hyphen is found to the immediate right of the "0" key. The underscore symbol is located on the same key as the hyphen, and is typed by pressing the shift key and the hyphen key simultaneously.
In computing, the hyphen is frequently used by programmers writing code for their applications, as well as for mathematical purposes by users needing to subtract one number from another. Hyphens are often confused with dashes, which are both longer and used for different purposes.
In the English language, hyphens are most commonly used for the purpose of breaking words into parts, or to combine two or more words into a single word.