This is a high level programing language that is used to add interactivity and dynamic behavior on a website.( making web pages interactive)

Key Features of JavaScript:

1. Client-Side Scripting: Runs in web browsers to create interactive user interfaces without requiring server interaction.

2. Event-Driven: Responds to user actions like clicks, form submissions, or keypresses.

3. Dynamic Typing: Variables can hold different types of data without specifying their type.

4. First-Class Functions: Functions are treated as first-class objects, enabling their use as arguments, return values, or assigned to variables.

5. Prototype-Based Object Orientation: Supports object-oriented programming through prototypal inheritance.

6. Cross-Platform: Works across different devices and operating systems as long as a browser or JavaScript runtime is available.

7. Server-side JavaScript- allows an application to communicate with a database

JavaScript and the ECMAScript specification-

European Computer Manufacturers Association- delivers standardized international programming language based on JavaScript.

Alert, Prompt & Confirm

There are several methods to make JavaScript output and/or grab data (from the user). They either modify or replace existing HTML, help debug, or retrieve HTML content. Let’s take a look at some of the methods:

• alert() A simple function to display a message to a dialog box (also called alert box).The alert() method cannot interact with the visitor.

alert("This is an alert box");

• prompt() To interact with the user we use prompt() which asks the visitor to input information and stores the information in a variable.

    var visitorName = prompt("What's your name : ")
  

• confirm() This method displays a dialog box with two buttons (OK and Cancel) and text as a parameter. If the user clicks on the OK button, confirm() returns true and on clicking the Cancel button, confirm() returns false.

    var isCoolWithIt = confirm("Are you ok with it?")
  

In JavaScript instructions are called statements and are separated by semicolons:

Comments

/ a one line comment

/* this is a longer,
 * multi-line comment
 */

code wars: practice 1

Create a function that takes an integer as an argument and returns "Even" for even numbers or "Odd" for odd numbers.

function OddorEven (n){
  if (n%2 === 0){
    return "Even"
  } else {
   return "Odd"
  }
}
let n=2
console.log(OddorEven(2))