Getting Started with JavaScript

Caroline Cah
Caroline Cah

To get started with JavaScript, you will need a text editor to write your code and a web browser to view your web pages. You can use any text editor, I recommend Visual Studio Code. Once you have a text editor installed, create a new file and save it with a .js extension.

Next, open your web browser and create a new HTML file. In the head section of your HTML file, add a script tag to link to your JavaScript file. Here is an example:

<!DOCTYPE html>
    <title>My Web Page</title>
    <script src="myscript.js"></script>
    <h1>Hello World!</h1>

In this example, the script tag is linking to a file named myscript.js.

Variables and Data Types

Variables are used to store values in JavaScript. To declare a variable, use the var keyword followed by the variable name. Here is an example:

var name = "Ada Lovelace";
var age = 30;
var isStudent = true;

What are variables?

In this example, the variable name is a string, age is a number, and isStudent is a boolean.

Variables are used to store values in JavaScript. To declare a variable, you use the var, let, or const keyword, followed by the variable name.

Conditional Statements

Conditional statements are used to execute different blocks of code based on a condition. The most common conditional statement in JavaScript is the if statement. Here is an example:

var age = 18;

if (age >= 18) {
  console.log("You are an adult");
} else {
  console.log("You are not an adult");

In this example, the code inside the for loop will execute 10 times, with the variable i starting at 0 and incrementing by 1 each time through the loop.


Functions are used to encapsulate a block of code and reuse it multiple times. Here is an example:

function addNumbers(a, b) {
  return a + b;

var result = addNumbers(2, 3);

In this example, the addNumbers function takes two parameters, a and b, and returns their sum. The result variable is set to the value returned by the function, which is then printed to the console.


This tutorial has covered some of the basics of JavaScript, including variables, data types, conditional statements, loops, and functions. With this knowledge, you can start building simple web applications and learning more advanced JavaScript concepts. Happy coding!

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