Meet Claude Code, an AI-powered assistant from Anthropic that lives right in your terminal. Think of it as an intelligent pair programmer that helps you write, debug, and understand code more efficiently. It's designed to integrate directly into your existing workflow, making it a seamless part of your development process.

Unlike simple code completion tools, Claude Code can understand the context of your entire project. It can read your repository, run commands, edit files, and carry out complex, multi-step tasks on its own. This agentic capability allows it to tackle problems that require changes across multiple files, like implementing a new feature or refactoring a large block of code.

Getting Claude Code running is straightforward. The main prerequisite is to have Node.js (version 18 or newer) installed on your system. If you don't have it, you can download it from the official Node.js website.

Once Node.js is ready, you can install Claude Code globally using the Node Package Manager (npm), which comes bundled with Node.js. Open your terminal or command prompt and run the following command:

This command downloads and installs the Claude Code command-line interface (CLI) on your computer, making the claude command available from any directory.

After the installation is complete, you need to authenticate with your Anthropic account. Run the login command:

This will open a browser window asking you to log in and authorize the CLI. Once that's done, you're all set. You can verify that everything is working correctly by checking the version number.

If the command returns a version number, your installation was successful. You now have a powerful AI assistant ready to help you directly from your terminal, integrated into the environment where you already do your work.

Before we move on, let's review the key concepts we've covered.

Time to check your understanding.