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.

Contenido del Curso

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

Strings 3/5

Accessing Character:

We can also access different characters from a string variable, and for that, we use the square brackets []. The syntaxes for accessing characters are str.charAt(pos) and variableName(pos) where pos is the position or index of the character that we want to access and variableName is the variable to be sliced. Let’s look at an example.


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let str = 'JavaScript';
console.log(str[0] );
console.log( str.charAt(4));

Tarea

Swipe to show code editor

A string value, England, is stored in a variable named country. The task is to display the letter a of the variable England.

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¿Todo estuvo claro?

¡Gracias por tus comentarios!

Sección 3. Capítulo 21

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Strings 3/5

Accessing Character:

We can also access different characters from a string variable, and for that, we use the square brackets []. The syntaxes for accessing characters are str.charAt(pos) and variableName(pos) where pos is the position or index of the character that we want to access and variableName is the variable to be sliced. Let’s look at an example.


              123
            
let str = 'JavaScript';
console.log(str[0] );
console.log( str.charAt(4));

Tarea

Swipe to show code editor

A string value, England, is stored in a variable named country. The task is to display the letter a of the variable England.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

¡Gracias por tus comentarios!

Sección 3. Capítulo 21

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

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