Go to the official Python website: https://www.python.org/downloads/
Download the latest Python installer for your operating system
Run the installer
On Windows, check the option to add Python to PATH
Complete the installation
Open IDLE from the Start menu on Windows
On macOS, open IDLE from the Applications folder or Launchpad
On Linux, install Python using your package manager if IDLE is not included
If needed, install IDLE separately using your system’s package manager
Verify IDLE opens successfully