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.

Зміст курсу

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 2/4

Boolean Data Type

We use the typeof operator to check the data type of variables, for example.


              1234
            
let isRaining = true;
console.log(typeof isRaining);
// or like this
console.log(typeof(isRaining));

As you can see in the above code we declared a variable named isRaining with the value of true, and its data type is boolean as expected.

Завдання

Swipe to show code editor

Declare a variable with the name isSunRises and set its value as true. Then check the type of isSunRises by using typeof() and display the output.

Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 3. Розділ 16

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Boolean 2/4

Boolean Data Type

We use the typeof operator to check the data type of variables, for example.


              1234
            
let isRaining = true;
console.log(typeof isRaining);
// or like this
console.log(typeof(isRaining));

As you can see in the above code we declared a variable named isRaining with the value of true, and its data type is boolean as expected.

Завдання

Swipe to show code editor

Declare a variable with the name isSunRises and set its value as true. Then check the type of isSunRises by using typeof() and display the output.

Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 3. Розділ 16

Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів

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