What does the well number generally mean?

Well number has many representations, for example, in English, it is often used to represent ordinal number; In Japanese, it is often marked with numbers; Micro-topics are often expressed in network hotspots; On the piano score, it often means rising by half a note; In programming, it means hexadecimal, etc. In Chinese, # is usually called "well number" or "well character" because of its appearance.

1. English: Unicode is suggested to be called number sign, probably because it is often used to represent ordinal numbers.

2. In Japanese: It is called "number mark" in Japanese, and usually exists in the dial pad of mobile phone.

3. On network hotspots: On social media platforms, if you want to bring a micro-topic, you will usually add "#" before or in front of the topic to become the topic entrance.

4. On piano music score: it often refers to raising half a note. The appearance is like a sharp sign of a diacritical mark in a musical score. For example, C# is pronounced "C-sharp". It should be noted that the sharp sign and the pound sign of the score are not exactly the same. The horizontal line of the standard pound sign (#) is horizontal, while the vertical line is inclined to the right; And the sharp mark of the score (? ) In order to be easy to identify in the staff, the horizontal line is changed to obliquely upward but the vertical line is vertical.

5. In programming: "#" is used to represent hexadecimal in programming languages such as HTML.

A symbol used to represent ordinal numbers.

In Chinese, it is usually called "well number" or "well character". In English, Unicode is suggested as a number symbol, perhaps because it is often used to represent ordinal numbers, while in Japanese, it is called a "number symbol". It usually exists in the dialing keyboard of mobile phones, and it is also used to replace the @ symbol in the mailbox on web pages to prevent it from being crawled, so as to protect the mailbox. Another symbol commonly used to represent ordinal numbers is.

Input method: hold down the Shift key and press 3, Unicode\u0023, ASCII35.