node:tldr:36c45

The command "node" is used to execute JavaScript code outside the browser. It is a runtime environment for executing JavaScript applications.

When you run the "node" command, it starts the Node.js runtime and provides you with a JavaScript REPL (Read-Evaluate-Print Loop) environment where you can directly enter and execute JavaScript code.

For example, you can create a JavaScript file (e.g., "app.js"), write some code in it, and then run the "node app.js" command to execute that file using the Node.js runtime.

Node.js also allows you to build server-side applications and command-line tools using JavaScript. By running JavaScript code on the backend using Node.js, you can perform tasks such as accessing file systems, network requests, interacting with databases, and more. It provides additional modules and libraries that make it easy to build highly scalable and performant applications.