Verifying the Install

What you'll learn: How to confirm Python is correctly installed and ready to use on your computer.

Why Verification Matters

After installing Python, you need to make sure it actually works before diving into programming. Think of it like checking that a new appliance is plugged in and turns on before trying to use it. This simple check saves you confusion later when you're ready to write your first Python programs.

The Verification Command

To verify your Python installation, you'll use your computer's command line (also called Terminal on Mac/Linux or Command Prompt on Windows). This is a text-based interface where you can type commands directly to your computer.

Here's what you do:

Open your command line interface
Type: python --version or python3 --version
Press Enter

What You Should See

If Python is installed correctly, you'll see a response showing the version number, something like:

Python 3.11.2 or
Python 3.10.8

The exact numbers will vary depending on which version you installed, but you should see "Python 3" followed by additional version numbers. This confirms that Python is installed and your computer knows where to find it.

If Something Goes Wrong

If you see an error message like "command not found" or "not recognized," it means Python isn't properly installed or your system doesn't know where to find it. In that case, you may need to reinstall Python or adjust your system's PATH settings.

Key Takeaway: Running python --version in your command line is the quickest way to verify Python is installed and discover which version you have—think of it as Python's "hello, I'm here and ready" response.