This document provides an overview of JavaScript/ECMAScript basics including syntax, variables, data types, operators, and statements. It covers key concepts such as case sensitivity, variable declaration and naming conventions, primitive and reference values, the typeof operator, conversions between data types, built-in objects like String and Number, and unary, arithmetic, comparison, logical, and assignment operators. The document is intended as an introduction to fundamental JavaScript concepts.

1. By: Satyen Pandya1JavaScript – ECMAScript Basicssatu21@gmail.com

2. Contents2 Syntax, Variables, Keywords, Reserved Words

3. Primitive and Reference Values

4. Primitive Types

5. Conversions

6. Reference Types

7. Operators

8. Statements

9. Functionssatu21@gmail.com

10. Syntax3 ECMAScript basic concepts :

11. Everything is case-sensitive

12. Variables are loosely typed

13. End-of-line semicolons are optional

14. Comments are the same as in Java, C, Perl

15. Braces indicate code blockssatu21@gmail.com

16. Variables4 Variables are defined by var operator

17. Variables do not require initialization like JAVA

18. Variables can hold different types of values at different times Variable name –

19. First character must be letter, an underscore (_)\ or dollar sign ($) Remaining characters may be underscores, dollarsings or any alphanumeric characters Variable should follow –

20. Camel Notation (e.g. myTest, myVar)

21. Pascal Notation (e.g. MyTest, MyVar)