Computer bit, byte, word, character relationship

1. A bit (bit) represents bits. Bits are the smallest unit of data storage within a computer, and 11010100 is a 8-bit binary number.
2. byte (byte) is denoted by "B" in uppercase. Bytes are the basic unit of data processing in a computer. In your computer
Stores and interprets information in bytes, which specifies that a byte consists of eight bits, that is, 1 bytes equals 8 bits (1byte=8bit).
Eight-bit binary number minimum is 00000000, the maximum is 11111111; usually 1 bytes can be stored in an ASCII code, 2 bytes can hold a Chinese character GB code.

3. Word computer for data processing, one access, processing and transmission of the length of the information is called the word, a word is usually composed of one or more bytes of integer, the length of the computer determines how much CPU a one-time operation to deal with the actual number of bits.
For example, a 32-bit computer, the number of bits per access is 4 bytes, and 64-bit computers, the number of bits per access is 8 bytes.

4. Character characters refer to the text and symbols used in the computer, such as: 1, 2, 3, 4, #￥% .... Wait a minute. In different encodings, the correspondence between characters and bytes is different:
In the ASCLL code, an English letter (no case) occupies a byte space, making a Chinese character account for two byte space.
Under UTF-8 encoding, an English character equals one byte, and one Chinese equals three bytes (including traditional).
In Unicode, one English equals two bytes, one Chinese (with traditional) equals two bytes; sign: English punctuation is one byte, Chinese is two bytes. Some extended Kanji accounts for four bytes.
In UTF-16 encoding, an English alphabetic character or kanji character is two bytes.
In UTF-32 encoding, the storage of any character requires 4 bytes.

Computer bit, byte, word, character relationship