JavaScript Advanced Programming (3rd edition)

Chapter 3rd Basic Concepts

In this chapter: syntax, data types, flow control statements, functions

3.1 Syntax

3.1.1 Case Sensitive

3.1.2 Identifier

Use Hump case Format

1) The first character must be a letter, an underscore (_), or a dollar sign ($);

2) Other characters can be letters, underscores, dollar signs, or numbers.

3.1.3 Notes

3.1.4 Strict mode

"Use Strict"

3.1.5 Statements

3.2 keywords and reserved words

3.3 Variables

Var

Local variables

3.4 Data types

5 Simple data types (also known as base data types): Undefined, Null, Boolean, number, and string

1 Complex data types: Object

3.4.1 typeof operator

The returned string: Undefined, Boolean, number, String, object (if the value is an object or a null value), and function

Isfinite () function, IsNaN () function

Numeric conversions: Number (), parseint (), and parsefloat ()

ToString (), String ()

Object:constructor, hasOwnProperty ( PropertyName), isPrototypeOf (object), propertyIsEnumerable ( PropertyName), toLocaleString (), toString (), ValueOf ()

3.5 operator

JavaScript Advanced Programming (3rd edition)