Identity low of logic

Question

Good day, I need help with some boolean algebra. I don't really know much, and my friends are having a hard time.

If someone can help, here's the question thing.

Identity low of logic:

A || (A && B) =A

Answer 1

The bracket part comes first A&&B which is B then we have A||B which will give you A, because the || only check for the first occurrence of true value

Answer 2

Btw.: These things differ between languages.

It's one of the things you can look up whenever you're not sure.

The keyword for regoogling it every time or printing it out as a cheat sheet once is:

operator precedence!

Answer 3

~ swim ~, the basic logic of && and || may be the same, but in the details there are a lot of differences when it comes to writing actual conditions and they get a bit longer.

Just compare the two lists of what is evaluated when and in which direction for C and Python ... it's tricky, to say the least.

https://docs.python.org/3/reference/expressions.html
https://en.cppreference.com/w/c/language/operator_precedence

Answer 4

~ swim ~, 🤣.

You're right, there's short circuit in Python as well, so as I said, if you only look at && and ||, behaviour is the same.

However, only look at not/!, and suddenly things start to change. And beyond that, it doesn't get less slippery.