What is the difference between Unicode and UTF-8

The content of this article is to introduce what Unicode and UTF-8 are, so that everyone can understand the difference (difference) between Unicode and UTF-8. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

What is Unicode?

Unicode is a character encoding scheme that uses two bytes to represent each character. Unicode defines a unique number in the range of 0 to 65,535 (216 – 1) for each character and symbol, regardless of platform, program, or language.

What is UTF-8?

UTF-8 is a standard mechanism for converting wide character values ​​to Unicode as a byte stream, an encoding format; can be encoded in 1 to 6 bytes Unicode characters.

The difference between Unicode and UTF-8

Unicode is a character set, while UTF-8 is an encoding rule.

A character set is a list of uniquely numbered characters (these numbers are sometimes called "code points"). To put it simply, each "character" is assigned a unique ID. For example, in the Unicode character set, the digit A is 41.

Encoding rules: It is a rule for converting "code bits" into byte sequences (encoding/decoding can be understood as the process of encryption/decryption). It is an algorithm for converting a list of numbers into binary, so it can Store it on disk.

For example, UTF-8 would translate a sequence of numbers like this: 1, 2, 3, 4:

00000001 00000010 00000011 00000100

Our data is now translated to binary The file can now be saved to disk.

Unicode and UTF-8 relationship diagram:

##Conclusion:

UTF -8 is the encoding used to convert binary data to numbers; Unicode is the character set used to convert numbers to characters.

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