Windows: You can download and install any python IDE such as Spyder, PyCharm etc. if python is not installed. Also, you can follow this if you only want to use CLI : https://docs.python.org/3/using/windows.html

Ubuntu: At first, we need to check whether Python is already installed or not:
python3 --version
or
python --version

If python3 is not installed, please run the following commands:
sudo apt-get update
sudo apt-get install python3

We are now ready to run the code by the following command:
python3 integerToWord.py
or
python integerToWord.py

Please enter a non-negative integer number: 992147483648
Nine Hundred Ninety Two Billion One Hundred Forty Seven Million Four Hundred Eighty Three Thousand Six Hundred Forty Eight

Total execution time: 0.00 seconds.

Please enter a non-negative integer number: safiur
Please enter a non-negative integer number only!