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ASCII stands for "American Standard Code for Information Interchange." It's a character encoding standard used for representing text in computers and communication equipment. In ASCII, each character is represented by a unique 7-bit binary number (0 to 127), which corresponds to a specific character, such as letters, digits, punctuation marks, and control characters.
Here are some key points about ASCII:
- Character Set: ASCII defines codes for 128 characters, including 33 control characters (such as carriage return and line feed) and 95 printable characters (letters, digits, punctuation marks, and symbols).
- Binary Representation: Each ASCII character is represented by a 7-bit binary number. For example, the uppercase letter 'A' is represented as 01000001.
- Compatibility: ASCII was first published in 1963 and became a widely adopted standard. It's compatible with many older computer systems and is still used in modern computing environments.
- Extended ASCII: While the original ASCII standard uses only 7 bits, extended ASCII character sets use 8 bits (1 byte), allowing for the representation of additional characters, often specific to certain languages or regions.
- Unicode: While ASCII remains prevalent, Unicode has largely superseded it for internationalization purposes. Unicode supports a much larger range of characters (over 143,000) and includes characters from many different writing systems worldwide.
Overall, ASCII provides a standardized way for computers to represent and exchange text data, laying the groundwork for modern character encoding standards.
ASCII ART:
- 作者:现代数学启蒙
- 链接:https://www.math1234567.com/article/ASCIISYSTEM
- 声明:本文采用 CC BY-NC-SA 4.0 许可协议，转载请注明出处。
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