A character set depends on the character set used. The ordering principle of a character set is the alphabet.
For example, all letters of the Latin alphabet belong to the corresponding character set. For Arabic numerals, the character set consists of 10 different characters. A binary character set consists of only two characters, the "0" and the "1". The single element is a binary character. Other character sets have a character set of over a hundred characters. For example, the ASCII character set has 128 characters represented by the digits 0 through 127.