Octothorpe
Alternatively referred to as a
hash, hash-mark, number, or a pound (not to be confused with the pounds sterling "£"), the octothorpe is the symbol above the number 3 on a United States qwerty keyboard. The octothorpe
symbol has two horizontal lines crossing two vertical lines ( # ). Some common
examples of how this symbol may be used include using it before a number, e.g. #1, in hashtags, e.g.
#computer, and in programming to identify a nonexecutable statement.
Also see: Hashtag, Keyboard definitions, Nonexecutable statement