In computing, the delete character (sometimes also called rubout) is the last character in the ASCII repertoire, with the code 127 (decimal). Not a graphic character, it is denoted as ^?
in caret notation and has a graphic representation ␡ in Unicode (as all other ASCII control characters have graphic representations).
There is no common method to input this character on modern keyboards, although in some environments (especially, Unix-like systems) the ← Backspace key or combination of Control and ← Backspace in, for example, Notepad may generate this code.