How does the python code run?

Python code can be executed in several ways:

1. With the Python interpreter, you can type the “python” command in the command line, input Python code line by line, and press Enter to execute it.
2. Run a script file using the Python interpreter: Save Python code as a file with the extension .py, then type python filename.py in the command line to execute the script file.
3. Utilize integrated development environments (IDEs) such as PyCharm, Visual Studio Code, and Jupyter Notebook to write and run Python code. Within these IDEs, you can easily create Python files, write your code, and execute it.
4. Online Python interpreters: Some online platforms (like replit, codecademy) offer online Python interpreters, allowing users to write and execute Python code directly on the web page.

No matter which method you use, the execution results of Python code will be displayed in the corresponding output window or command line.