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eestsaid
1,311 PointsBoolean basics
What is the logic requiring (True and False) to be (True and True) to return True?
2 Answers
Chris Freeman
Treehouse Moderator 68,423 PointsBased on your updated question
True or False returning True makes sense if I understand it correctly i.e. there is True or False in the statement so it returns True. True and False is however False and I'm not sure of the reasoning for this.
Python evaluates logical expressions in a lazy process.
- For a statement with
or, the first item to evaluate toTruewill make the entire statementTrueregardless of the other items. - For a statement with
and, the first item to evaluate toFalsewill make the entire statementFalseregardless of the other items.
If you have two items A and B and you want a True expression for when A is True and B is False, then use
if A and not B:
If B is False then not B is True.
Post back if you need more help. Good luck!!!
eestsaid
1,311 PointsPerfect, thanks.
eestsaid
1,311 PointsHard to articulate but will give it a go.
True or False returning True makes sense if I understand it correctly i.e. there is True or False in the statement so it returns True. True and False is however False and I'm not sure of the reasoning for this.
Chris Freeman
Treehouse Moderator 68,423 PointsChris Freeman
Treehouse Moderator 68,423 PointsCan you please restate your question please? It’s not obvious what you’re asking.