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ASCII Table

Category Programming Technology

ASCII (pronounced: American Standard Code for Information Interchange) is a computer coding system based on the Latin alphabet. It is primarily used to display modern English, and its extended version, ASCII, can partially support other Western European languages, equivalent to the international standard ISO/IEC 646.

ASCII evolved from telegraph codes. The first edition of the standard was published in 1963, underwent a major revision in 1967, and the last update was in 1986, defining a total of 128 characters; 33 of these characters are non-displayable (some terminals provide extensions that allow these characters to be displayed as 8-bit symbols such as smileys and card suits), and most of these 33 characters are obsolete control characters. Control characters are primarily used to manipulate text that has already been processed. Beyond the 33 characters are 95 displayable characters. The space character produced by pressing the spacebar on the keyboard is also considered a displayable character (displayed as a blank).

Displayable Characters

The range of displayable character codes is 32-126 (0x20-0x7E), totaling 95 characters.

Control Characters

The range of ASCII control character codes is 0-31 and 127 (0x00-0x1F and 0x7F), totaling 33 characters.


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