Evaluating boolean operators


#1


Hi all! I am currently stuck on the following exercise:

https://www.codecademy.com/courses/python-beginner-BxUFN/2/5?curriculum_id=4f89dab3d788890003000096#

I can't seem to understand exactly how to simplify not/and/or statements. The hint on the exercise states the following:

  1. True or not False and False. not gets evaluated first, so we have True or True and False.

  2. and goes next, so we get True or False.

  3. As we've seen, True or False is True, so the value finally returned is True!

How does True or True and False come out to True or False? And why would True or False come out to True? I can't seem to recall learning this, despite it stating so.

Thanks!


#2

As they have stated, not gets evaluated first and you understand that.
Next, True or True and False becomes True or False because and gets evaluated first (like order of operations). And True and False is False.
Basically doing True or (True and False) -> True or False.

and produces True ONLY IF the booleans are ALL True such as True and True.
or produces True IF AT LEAST ONE of the booleans are True such as True or False.


#3

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