For a number's mathematical sign, see Sign (mathematics). The symbol # is known as the number sign, [1] hash, [2] (in North America) the pound sign, [3] and has a variety of other names.

number sign, versatile symbol (#) most commonly used to preface numbers (e.g., apartment #1) but which encompasses a variety of other uses, especially to tag (or hashtag) posts and messages on …

The number sign (#) is a typographical symbol that represents the word “number” in American English and in Canada. Generally placed immediately before a number or series of digits (with no spaces), it …

Number sign is a name for the symbol #, which is used for a variety of purposes, including the designation of a number (for example, "#1" stands for "number one").

Sep 7, 2025 · Also called a hash, number sign, or pound sign, the octothorpe is the typographical symbol "#" (two horizontal lines and two vertical lines, crossed). On US QWERTY keyboards, the # …

Feb 6, 2020 · The "#" symbol has many names: number sign, hash sign, pound sign, octothorpe. But when should you use it in your writing? Check out our blog to find out.

Apr 11, 2022 · What is a pound symbol? The pound symbol (#), also known by many other names that include pound sign, number sign, hash mark, and hashtag, is a typographical symbol that is rarely …

Mar 25, 2025 · Describes guidelines to use the number sign ' (\#)' in Microsoft documents and provides examples.

Each question is preceded by a number sign (#). If the first character in an entry is a number sign (#), the program treats the entry as a comment and ignores it.

The number sign symbol, also frequently referred to as the "pound sign" in North America is used in programming languages as a special character.