01 Install Node

Goal: confirm Node is installed and run your first file.

Check your Node version

node --version   # expect v26.x or similar

If the command is not found, download Node from nodejs.org or install it with fnm:

# install fnm (macOS / Linux)
curl -fsSL https://fnm.vercel.app/install | bash

# then install and use Node 26
fnm install 26
fnm use 26

Run your first file

Create hello.js:

// hello.js
console.log("hello from node");

Run it:

node hello.js    # prints: hello from node

Checkpoint: you see hello from node printed to the terminal.

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