# one hashtag for a single line comment
"""
3 quote marks is technically
a docstring, but it works as
a multi line comment
"""
##pressing 'Alt 3' in IDLE comments out
##what you are selecting
and 'Alt 4' to uncomment
if False:
print('Hello') # yes you can do it at the end of a line
you can technically put if False around code you dont want it to run,
but that would mean it has to have correct syntax,
and would not be good for readability.