Home | | Computer Applications 11th std | Lexical Structure of a JavaScript Program

Chapter: 11th Computer Applications : Introduction to JavaScript

Lexical Structure of a JavaScript Program

The lexical structure of a programming language is the set of elementary rules that specifies how to write programs in that language.

Lexical Structure of a JavaScript Program

 

The lexical structure of a programming language is the set of elementary rules that specifies how to write programs in that language. It is the lowest-level syntax of a language. The Lexical structure specifies variable names, the delimiter characters for comments, and how one program statement is separated from the next.

         Though JavaScript is a case-sensitive language. It is good programming practice to type the command in lowercase.

        JavaScript ignores spaces that appear between tokens (identifiers, operators, punctuator, constants and keywords) in programs.

        JavaScript supports two styles of comments. Any text follow a “//” and the end of a line is treated as a single line comment and is ignored by JavaScript. Any text between the characters “ /* */” is also treated as a multiline comment.

         JavaScript uses the semicolon (;) to separate statements. Many JavaScript programmers use semicolons to explicitly mark the ends of statements.

         A literal is a data value for variable that appears directly in a program.

         An identifier is simply a name. In JavaScript, identifiers are used to name variables, functions and to provide labels for certain loops in JavaScript code.

         In JavaScript certain keywords are used as reserved words, These words cannot used as identifiers in the programs

 

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
11th Computer Applications : Introduction to JavaScript : Lexical Structure of a JavaScript Program |


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2023 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.