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"A Beginner's Guide to the Fundamentals"

 

How to run JavaScript code?





To write JavaScript code using Visual Studio Code (VSCode), follow these steps:

1. Install Visual Studio Code:

  • Download and install Visual Studio Code from the official website:
  • https://code.visualstudio.com/

2. Set Up a Project Folder:

  • Create a folder on your computer where you'll store your JavaScript files.
  • Open Visual Studio Code and select "Open Folder" to open your project folder.

3. Create a JavaScript File:

  • Inside your project folder, right-click and choose "New File" to create a new file.
  • Give the file a name with the .js extension (e.g., index.js).

4.Write JavaScript Code:

  • Open the JavaScript file in Visual Studio Code.
  • Start writing your JavaScript code in the file.

5. Running JavaScript Code:

  • To execute the JavaScript code, you have a few options:
  • Open the integrated terminal in Visual Studio Code using Ctrl+ (backtick) and runnode script.js` to run the script using Node.js.
  • Install Node.js from here


To print "Hello, world!" in JavaScript, you can use the console.log() function. 
Here's an example:

                console.log("Hello, world!");

console.log() is a function in JavaScript that allows you to display output in the console. The console is a built-in feature available in web browsers and development environments like Node.js. 

Variables


In JavaScript, variables are used to store data values. They provide a way to assign a name to a value, which can be used and manipulated throughout your code.





Variable Declaration:

In JavaScript, you can declare variables using the var, let, or const keywords.

var is the older way of declaring variables, while let and const were introduced in newer versions of JavaScript (ES6+).

Here's an example of variable declaration:
    
                            var age = 25;
                            let name = "John";
                            const PI = 3.14;

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