Character: * Chinese name: rice font size, asterisk, multiplication sign 1. It is usually used as a comment symbol. 2 is used to represent the password to reflect the number of characters entered, and at the same time, it can avoid the password being seen by people. 3 can also be expressed as a popular symbol on the Internet, such as *-* (halo) 4. It also means that some words or expressions cannot be displayed or are not suitable for word review, such as pornography, reaction and other sensitive words. 5 is used to represent pointer declarator in C language, and 6 also means "multiplication sign", 7 telephone keys, 8 wildcards, and 9 computer multiplication signs 10.