"_" is underlined. Click "Shift"+"-"when typing in English, which is often used to enhance attention. Underline refers to the horizontal line drawn below the word. The underscore symbol is _. In some documents, underline is generally used to mark important or noticeable words, but it is not a real underline.
The key after the number "0" on the keyboard. Use the SHIFT key to add "-"? You can enter it on the keyboard. It can only be "_" in English input state, and underlined in Chinese input state. Its function is to emphasize words and attract attention. Underline can be divided into single underline, double underline, bold underline, underlined dotted line, etc. In, the text (hyperlink) that can be linked is usually underlined.
It often appears in electronic files instead of a Chinese character. On the Internet, the use of the _ underscore symbol can be basically divided into two categories. One is as a filling line, where you need to add underscores, you can type multiple _ underscores continuously, which can be spliced together to form a filling line, and the length can be adjusted at will;