Hashtag Symbol (#)

For hashtag symbol, the copyable form is #; Unicode records it as U+0023 NUMBER SIGN. In social media it begins a hashtag; in other contexts it may mark a number, a fragment identifier, a color value, or programming syntax. For hashtag symbol, the surrounding label determines whether # acts as punctuation, a text marker, or another encoded character. The notation can be tested with #symbols, Issue #42, URL fragment: page#section, and CSS color: #336699. These hashtag symbol examples show # in its actual role rather than as an isolated glyph. Common uses include Plain text, Editorial writing, Identifiers and syntax, and File and path names. For the hashtag symbol entry, keep # selectable and identify its function in labels, code samples, or editorial notes. The canonical scope is limited as follows: This page covers # and explicitly separates it from the music sharp sign ♯ and from the pound currency sign £. The most likely errors are using ♯ in a hashtag, calling # the pound currency sign in a context where £ is meant, and adding spaces inside a hashtag. For consistent output, apply these rules. Keep hashtag words adjacent to #. Follow the syntax rules of the target platform or language. Use ♯ for a musical sharp, not #. For HTML, use decimal # and hexadecimal #; the CSS escape is 23. Keep # selectable, and add a readable label whenever hashtag symbol carries essential meaning. One scope check is the question “Is # the music sharp symbol?” The approved response is: No. Music sharp is ♯, U+266F. When the destination app does not offer a dedicated key, use the reviewed methods: Windows: Use the key that produces # on the active keyboard layout. macOS: Use the key that produces # on the active keyboard layout. The final text should remain #, U+0023. Those references support the encoded identity U+0023 and the limited use described for hashtag symbol.