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JavaScript Tutorials

INTRODUCTION

» Introduction to JavaScript

» Practice IT Editor

» JavaScript Example

» JavaScript Placement

» JavaScript Syntax

» JavaScript Statements

» JavaScript Input

» JavaScript Output

» JavaScript Comments

» JavaScript Variables

» Variables' Scope

» JavaScript Operators

» JS Expressions & Concatenation

» JavaScript Data Type

» JavaScript Numbers

» Number Object

» JavaScript Strings

» String Object

» JavaScript Booleans

» Boolean Object

» JavaScript Functions

» JavaScript Arrays

» Array Object - Properties

» Array Object - Methods

» JavaScript Objects

» JavaScript Undefined

» JavaScript Nulls

CONDITIONAL TESTING

» If Statement

» If Else Statement

» JavaScript Ternary Operator

» Switch Statement

LOOPS

» For Loops

» While Loops

» Break & Continue

» For...In Loops

» do...while Loop

FUNCTIONS

» JavaScript Functions

» Creating Functions

» Functions' Parameters

» Functions' Arguments

» Function Invocation

» The Return Keyword

» The Arguments Object

» Callback Functions

» Arrow Functions

ARRAYS

» JavaScript Arrays

» Creating Arrays

» Accessing Arrays

» Looping Arrays

» Multi - dimensional Arrays

OBJECTS

» JavaScript Objects

» Creating Objects

» Prototype Definition

» Accessing Objects

» The this Keyword

AJAX

» Introduction to AJAX

JSON

» Introduction to JSON

JAVASCRIPT DATES

» The Date Object

» Date Methods

» Timing (SetInterval & SetTimeout)

MATH OBJECT

» Math Object

» Math Methods

HTML / JS DOM

» DOM Introduction

» Accessing HTML Elements in DOM

» Get And Change Elements' Contents & Values

» Change Styling - DOM CSS

» DOM Attributes

» JavaScript Event Listeners

» DOM Event Listeners

» JS Events

MISCELLANEOUS

» JS Strict Mode

» JavaScript Hoisting

» JavaScript let keyword

» Reserved Keywords

» JS Best Practices

» JavaScript vs ECMAScript

JAVASCRIPT EXAMPLES

» JavaScript Calculator

.. » JavaScript » Introduction » Practice IT Editor
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Practice IT Editor

With the help of our HTML, CSS, JS online PRACTICE IT editor, you will be able to see the web result of our various HTML, CSS, JS examples and edit same to see the results even as you learn. This was developed to hasten the learning process. That is, you learn something and see the result immediately even as you learn when you click on the "PRACTICE IT" button on any of the examples. EXAMPLE
<h1>ADD TWO NUMBERS</h1>
<div><p>FIRST NUM:</p>
<input id='num1' type='number'></div>
<div><p>2ND NUM:</p>
<input id='num2' type='number'></div>
<p id='sum'></p>
<p><button onclick='addnum()'>ADD</button></p>

<script>
function addnum(){
var sum;
var num1 = document.getElementById("num1").value;
var num2 = document.getElementById("num2").value;

num1 = (num1 != ""? num1: 0);
num2 = (num2 !=""? num2: 0);
sum = parseInt(num1) + parseInt(num2);
document.getElementById("sum").innerHTML = "The sum of "+num1+" and "+num2+" is "+sum;
}
</script>

Copy PRACTICE IT

Click on the "PRACTICE IT" button above to see the result of the example. On the "result" page, you can click on SOURCE CODE to see the code that produced the result and also edit same to produce different results.
Take a short quiz on Practice IT Editor.
Ask a question or tell us if Practice IT Editor is easy or not.
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