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I. Core JavaScript > 2. Lexical Structure

Chapter 2. Lexical Structure

The lexical structure of a programming language is the set of elementary rules that specifies how you write programs in that language. It is the lowest-level syntax of a language; it specifies such things as what variable names look like, what characters are used for comments, and how one program statement is separated from the next. This short chapter documents the lexical structure of JavaScript.

Character Set

JavaScript programs are written using the Unicode character set. Unlike the 7-bit ASCII encoding, which is useful only for English, and the 8-bit ISO Latin-1 encoding, which is useful only for English and major Western European languages, the 16-bit Unicode encoding can represent virtually every written language in common use on the planet. This is an important feature for internationalization and is particularly important for programmers who do not speak English.


  

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