how to run python file using different names code example

Example 1: how to run a python script

# Save the script in a file with .py extension
# run the script using the below command
python fileName.py

Example 2: how to run python in terminal

#For Python 3:
$ python3 helloworld.py
#For Python 2:
$ python helloworld.py

Example 3: run python program from command line

# press [windows] + [R] (on windows only)
# use the command : cd/the_way_of_your_program
# and now use this command :

py the_name_of_your_program.py 

# don't forget to write the extension (py for python) 
# at the end of your program name