[计算机基础]计算机数据的存储方式([fundamentals of Computer] storage mode of computer data)-其他

[计算机基础]计算机数据的存储方式([fundamentals of Computer] storage mode of computer data)

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The computer can only recognize binary. The minimum unit of data in the computer is the single digit of binary, which is called bit for short and bit in English. One bit can only represent two states, namely 0 or 1, and two bits can represent four states, namely 00, 10, 01 and 11. For letters, numbers and symbols that people usually use, they can be distinguished only by coding with 8-bit binary numbers. Therefore, the 8-bit binary number is called “byte”, which is the basic unit of computer storage and operation.

The minimum unit of computer data is bit, that is, a binary number. The basic unit of computer storage and operation is byte, that is, an 8-bit binary number, that is, 8 bits.

In the process of data transmission within the computer, data is usually transmitted by an integer multiple of bytes. The number of bits that the computer can transmit data at the same time is called word length. The word length is determined by the hardware structure of the CPU itself, which corresponds to the number of data buses. The word length is different in different computer systems. The commonly used word lengths in computers are 8 bits, 16 bits, 32 bits and 64 bits.

The word length is determined by the CPU of the computer. A word length can represent 2 bytes, that is, 16 bit data can be transmitted at one time; It can also represent 4 bytes, that is, 32-bit data can be transmitted at one time.