Step 1: Download the Installer

The first step for any operating system is to visit the official Python website. They provide installers that handle most of the configuration automatically.

• Navigate to: https://www.python.org/downloads/
• Click the large button that says "Download Python 3.X.X" for your specific OS (Windows, macOS).

Installing on Windows

1. Run the Executable: Double-click the downloaded .exe installer file.
2. Check the PATH Box (Crucial!): At the very first screen of the installer, look for the checkbox at the bottom that says "Add python.exe to PATH" and make sure it is checked. This saves you a lot of manual setup later.
3. Choose Installation: Select "Install Now" for the default setup, which includes IDLE (a basic editor), pip, and documentation.
4. Finish: Click "Close" when the setup is complete.

Installing on macOS

1. Run the Package: Double-click the downloaded .pkg file to start the installer.
2. Follow Prompts: Proceed through the installer screens (Introduction, License, Destination Select, Installation Type).
3. Enter Password: You may need to enter your administrative password to allow the installation.
4. Check Documentation: The installer will place the Python 3 framework and supporting files in the appropriate locations.

Installing on Linux (Package Manager)

Most Linux distributions come with Python pre-installed, but you might need a newer version or the developer libraries. Use your distribution's package manager: