Unicode (Unicode horizontal tabulation character): Unicode, formally The Unicode Standard, is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, which is maintained by the Unicode Consortium, defines as of the current version (15.0) 149,186 characters covering 161 modern and historic scripts, as well as symbols, 3664 emoji[5] (including in colors), and non-visual control and formatting codes.
ASCII (American Standard Code for Information Interchange): ASCII码和编程语言之间有密切的联系，因为ASCII码是计算机和通信设备用于表示和处理文本数据的标准字符编码系统，而编程语言通常需要处理文本数据。The ASCII code for "A" is also the same as the Unicode code point for "A", because the ASCII character set is a subset of the Unicode character set. This means that ASCII characters are also valid Unicode characters.
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