Unicode encoding/decoding

Unicode encoding/decoding Introduction

1. unicode is a character set standard, aiming to provide a unified encoding solution for all writing systems in the world.

2. unicode's goal is to assign a unique code point to each character, regardless of which language, symbol, or emoji the character belongs to.

3. unicode uses code points to represent each character. code points range from u+0000 to u+10ffff, which can represent more than 1,114,000 different characters.

4. code points are usually represented in hexadecimal and are prefixed by u+.

5. in programming languages, unicode characters can be represented by escape sequences.

6. for example, in javascript, you can use \uxxxx (where xxxx is the hexadecimal value of the code point) to represent characters in bmp, and \u{xxxxx} to represent characters in other planes.