Introduction to JavaScript (staging)

Introduction to JavaScript (staging)

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1. Introduction

Writing our first code on JavaScript.

Writing our first code

Output Using Variables 1/2

Output Using Variables 2/2

2. JavaScript syntax

The syntax of the JavaScript programming language is the set of rules that defines how a JavaScript program will be written and interpreted (by both the runtime system and by human readers).

JavaScript Syntax

JavaScript Variables

JavaScript Operators

Identifiers in JavaScript

Naming Identifiers

Reserved keywords in JavaScript

Naming Convention in JavaScript. Case Styles

Variables Naming Convention

Boolean Naming Convention

Constant Naming Convention

Function & Classes Naming Convention

Multiline Strings

Multiline Strings. Concatenating

Commenting in JavaScript

Commenting in JavaScript. Multi-line Comments

3. Data Types and Variables

JavaScript is dynamically typed (also called loosely typed) scripting language. That is, in javascript variables can receive different data types over time. Datatypes are basically typed of data that can be used and manipulated in a program.

Course Content

Introduction to JavaScript (staging)

Introduction to JavaScript (staging)

1. Introduction

Writing our first code Output Using Variables 1/2 Output Using Variables 2/2

2. JavaScript syntax

JavaScript Syntax JavaScript Variables JavaScript Operators Identifiers in JavaScript Naming Identifiers Reserved keywords in JavaScript Naming Convention in JavaScript. Case Styles Variables Naming Convention Boolean Naming Convention Constant Naming Convention Function & Classes Naming Convention Multiline Strings Multiline Strings. Concatenating Commenting in JavaScript Commenting in JavaScript. Multi-line Comments

Boolean Naming Convention

Boolean naming convention

Boolean, in programming, is a data type that is either true or false. Prefixes like is, has, and are added in the booleans to distinguish them from other variables. Boolean data-type has two values true or false.

Note We will discuss booleans in more detail in the upcoming chapters.


              1234567
            
// Not clear that the identifier is a boolean
let clear = true;
console.log(clear);

// clear that the identifier is a boolean
let isClear = true;
console.log(isClear);

Task

Declare a boolean variable with an identifier Raining. Use the prefix is with the above boolean variable and store the false value in it. Display the value of the variable in the end.

Task

Declare a boolean variable with an identifier Raining. Use the prefix is with the above boolean variable and store the false value in it. Display the value of the variable in the end.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 2. Chapter 9

toggle bottom row

Boolean Naming Convention

Boolean naming convention

Boolean, in programming, is a data type that is either true or false. Prefixes like is, has, and are added in the booleans to distinguish them from other variables. Boolean data-type has two values true or false.

Note We will discuss booleans in more detail in the upcoming chapters.


              1234567
            
// Not clear that the identifier is a boolean
let clear = true;
console.log(clear);

// clear that the identifier is a boolean
let isClear = true;
console.log(isClear);

Task

Declare a boolean variable with an identifier Raining. Use the prefix is with the above boolean variable and store the false value in it. Display the value of the variable in the end.

Task

Declare a boolean variable with an identifier Raining. Use the prefix is with the above boolean variable and store the false value in it. Display the value of the variable in the end.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 2. Chapter 9

toggle bottom row

Boolean Naming Convention

Boolean naming convention

Boolean, in programming, is a data type that is either true or false. Prefixes like is, has, and are added in the booleans to distinguish them from other variables. Boolean data-type has two values true or false.

Note We will discuss booleans in more detail in the upcoming chapters.


              1234567
            
// Not clear that the identifier is a boolean
let clear = true;
console.log(clear);

// clear that the identifier is a boolean
let isClear = true;
console.log(isClear);

Task

Declare a boolean variable with an identifier Raining. Use the prefix is with the above boolean variable and store the false value in it. Display the value of the variable in the end.

Task

Declare a boolean variable with an identifier Raining. Use the prefix is with the above boolean variable and store the false value in it. Display the value of the variable in the end.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Boolean naming convention

Boolean, in programming, is a data type that is either true or false. Prefixes like is, has, and are added in the booleans to distinguish them from other variables. Boolean data-type has two values true or false.

Note We will discuss booleans in more detail in the upcoming chapters.


              1234567
            
// Not clear that the identifier is a boolean
let clear = true;
console.log(clear);

// clear that the identifier is a boolean
let isClear = true;
console.log(isClear);

Task

Declare a boolean variable with an identifier Raining. Use the prefix is with the above boolean variable and store the false value in it. Display the value of the variable in the end.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 2. Chapter 9

Switch to desktop for real-world practiceContinue from where you are using one of the options below

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