Simple Way To Learn JavaScript

Cara Mudah Belajar JavaScript

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Notes On Introduction To JavaScript

by www.NotaRazi.com

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Introduction

1.Generic Approach To Learn Programming

1.1.Control Flow Structure

1.2. Basic Code Module Structure

1.3. Code Syntax

2. Preparing To Write JavaScript On Windows Platform

3. Basic Scripting With Sequential Control

Hello World

Heading and Paragraph

Insert JavaScript

Writing simple data processing operations

Writing Data Processing and Displaying String and Number

Writing more numerical operations

Processing Numerical Entry and Display Fixed Format

Processing Two Inputs

4. Basic Scripting With Selection Control

IF … ELSE Control

Selection Control using OR and AND operator in logical expression

Selection Control and standardizing input value

5.Basic Scripting With Loop Control (WHILE)

6.Basic Scripting With Loop Control (FOR)

7. Using Form To collect Data

8.Setting a value in a form object

9. Problem Decomposition Technique Using Calculator Program

Designing Calculator Layout

Creating JavaScript Function To Display Value

Collecting Input From Button Clicks

Prepare input data for calculation

Perform Calculation Works

Fully Functional Calculator Program

Introduction

JavaScript (sometimes abbreviated JS) is a scripting language commonly implemented as part of a web browser in order to create enhanced user interfaces and dynamic websites.

JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It uses syntax influenced by the language C. JavaScript copies many names and naming conventions from Java, but the two languages are otherwise unrelated and have very different semantics.

JavaScript's use in applications outside web pages — for example in PDF documents, site-specific browsers, and desktop widgets—is also significant. Newer and faster JavaScript VMs and frameworks built upon them (notably Node.js) have also increased the popularity of JavaScript for server-side web applications.

1.Generic Approach To Learn Programming

1.1.Control Flow Structure

1.1.1.Sequential (turutan)
pseudo-code

BEGIN PRINT “Hello World” END

output

Hello World

 1.1.2.Selection (pilihan)
pseudo-code

BEGIN READ pin IF pin=1234 PRINT “correct” ELSE PRINT “wrong” ENDIF END

output IF

1234 “correct”

output ELSE

5678 “wrong”

1.1.3.Loop (gelung)
pseudo-code

BEGIN FOR a: 1 TO 10 PRINT a + “**********” ENDFOR END

output

1********** 2********** 3********** 4********** 5********** 6********** 7********** 8********** 9********** 10**********

1.2. Basic Code Module Structure

pseudo-code

MAIN MODULE BEGIN Action1 Action2 Call Module1 Action3 END MAIN MODULE

MODULE1 BEGIN Action1 Action2 Return Value END MODULE 1

1.3. Code Syntax

1.3.1.Basic Code Structure

1.3.2.Reserved Keywords

1.3.3.Data Containers

1.3.4.Data Operators


pseudo-code

READ Y,Z //y=2, z=3 LET X= 3 * Y - (2+Z) PRINT X

output

1

explanation

RESERVED KEYWORDS DATA CONTAINERS DATA OPERATORS DATA

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