UTF-16 is more efficient for A) characters for which it requires less data to be uploaded than it does for UTF-8. UTF-8 is more efficient for B) characters for which it requires less data to be generated.
Why do we use Unicode?
To unify all the different Encoding schemes so that the confusion between computers can be limited is the objective of Unicode. The Unicode standard defines values for over 128,000 characters and can be found at the Unicode Consortium.
It is still a lookup of bits and characters, even though it is just another type of character encoding. The main difference between the two is that the characters can be up to 32 bits wide. Over 4 billion unique values is what that is.
For various reasons, not all of that space will ever be used, and there will never be more than 1,111,998 characters in Unicode. A piece of software implements a standard called the Unicode standard.
Why do I need to use Unicode when I want to convert to it?
In order to highlight the scope and use of the Unicode Standard, it is necessary to develop, extend and promote use of it.
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Why do we use UTF-8 encoding?
Code points with lower numerical values are more likely to be used in a way that uses fewer bytes. Most programming and document languages that use a special way to interpret certain ASCII characters are safe to use with non-ASC II code.
The spatial efficiency of the character code point is a key advantage. A text file written in English would be four times the size of a file with the same characters, if every character was represented by four bytes.
A character in the alphabet can be up to 4 characters long. Any character in the standard can be represented with the UTF-8 code. UTF-8 is compatible with the other programming languages
This conversion and others with different lengths are summarized in the following table. The colors show the distribution of bits from the code point to the bytes. Black is the color of the additional bits added by the process. Six bits perbyte is used to represent the actual characters that are being written.