Lecture "Programming languages", exercise 1

[essepuntato]

What is the boolean value of not (not True or False and True) or False?

[ValkyrieCain9]

True

[martinamrc]

If I understood correctly the order of the operations:

1. (not True or False and True): 1) not True = False, 2) False and True = False, 3) False or False = False.
2. not (False) = True.
3. True or False = True.

The value is True.

[maridematteis]

[KikaYang]

True

[lisitein]

NOT FALSE OR FALSE= TRUE

[SinerYuu]

True

[martinaucch]

True

[arinee01]

True

[mir-pin]

not (not True or False and True) or False?

not True = False False and True = False

so we have not (False or False) or False?

False or False = False

so again not False or False?

not False = True

so in the end

True or False? 
True

[polinakhrm]

not (not True or False and True) or False? 1) not True = False 2) False and True = False 3) False or False = False

not False or False? 1) not False = True

True or False? True

[essepuntato]

Hi all,

While all results are good, in some of your answers, you are not applying the right resolution order for the boolean operators. As described in the chapter, it should be as follows:

First, one must execute all the not operations. Then, one must perform all the and operations. Finally, one must assess the remaining or operations.

Thus, the resolution of not True or False and True should be:

1. False or False and True
2. False or False
3. False

[ERendall]

A bit late to the game, and I have cut out Prof. Peroni's answer before I tried to answer this:

1) not (not True or False and True) or False. 2) not (False or False and True) or False. 3) not (False or False) or False. 4) True or False. 5) True.

[nicoldamelio]

True

[simplycyrus99]

not True = false false and true = false false or false = false not false or false = true or false = true

[romashovar]

True