Running Node.js and Writing Basic Scripts
Explore how to launch the Node.js interactive REPL environment to test JavaScript code quickly. Learn to write, save, and run simple JavaScript scripts using Node.js commands. This lesson builds foundational skills for server-side programming with Node.js by practicing variable usage and basic math operations.
Node.js is a runtime environment, which means it doesn’t come with a graphical user interface like some other development tools. We interact with Node.js through a command-line interface (CLI). In this lesson, we’ll learn to run Node.js, use its interactive environment (REPL), and create a basic script. Once we’re comfortable with this, we’ll have taken our first steps into server-side JavaScript.
Running Node.js in interactive mode (REPL)
The Node.js REPL lets us interact with JavaScript directly. REPL stands for Read-Eval-Print Loop:
Read: It reads the input. ...