Course Content

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

What are Variables?

Variables are the memory locations that are used to store data. In JavaScript, we use the let, const, and var (var is not used now) keywords to declare a variable.

By using let we can re-assign the value to a variable. Values can not be reassigned if they are created using const.

The following statement creates a variable named message.


              1
            
let message;

Now we can assign some data to the variables by using the assignment operator sign (=), for example.


              12345
            
let message;
message = 'Hello';
// or you can do it in one line as well like this
// let message = 'Hello';
console.log(message);

Task

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

Task

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

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

Everything was clear?

Section 3. Chapter 1

What are Variables?

Variables are the memory locations that are used to store data. In JavaScript, we use the let, const, and var (var is not used now) keywords to declare a variable.

By using let we can re-assign the value to a variable. Values can not be reassigned if they are created using const.

The following statement creates a variable named message.


              1
            
let message;

Now we can assign some data to the variables by using the assignment operator sign (=), for example.


              12345
            
let message;
message = 'Hello';
// or you can do it in one line as well like this
// let message = 'Hello';
console.log(message);

Task

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

Task

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

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

Everything was clear?

Section 3. Chapter 1

What are Variables?

Variables are the memory locations that are used to store data. In JavaScript, we use the let, const, and var (var is not used now) keywords to declare a variable.

By using let we can re-assign the value to a variable. Values can not be reassigned if they are created using const.

The following statement creates a variable named message.


              1
            
let message;

Now we can assign some data to the variables by using the assignment operator sign (=), for example.


              12345
            
let message;
message = 'Hello';
// or you can do it in one line as well like this
// let message = 'Hello';
console.log(message);

Task

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

Task

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

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

Everything was clear?