and True False returns True

Question

and True False returns True

stoverc opened this issue 3 years ago · 8 comments

stoverc commented 3 years ago

and True False when it should return False.

Answer 1 · 2022-01-31T00:43:13.000Z

Similarly, (and true false false) returns true.

Answer 2 · 2022-01-31T01:11:07.000Z

We can get the expected behavior if we do:

make "true (1 = 1)
make "false (1 = 0)

Then:

? and true false
You don't say what to do with false
? (and true false false)
You don't say what to do with false

Answer 3 · 2022-01-31T01:16:29.000Z

I didn't see anywhere in the documentation saying that we define true and false. @brianharvey Any opinion on if we should add true and false to the initial environment?

Answer 4 · 2022-01-31T01:26:42.000Z

It doesn't say they're defined, per se, but it does say they're "special":

Clearly not a definitive thing, but it is somewhat suggestive.

Answer 5 · 2022-01-31T01:30:13.000Z

On 1/30/22 5:16 PM, Joshua Cogliati wrote: I didn't see anywhere in the documentation saying that we define true and false. @brianharvey Any opinion on if we should add true and false to the initial environment?

I don't have a strong opinion either way, but those examples would have worked if the words were quoted (like any other situation in which you want a literal word as an input): AND "TRUE "FALSE and so on.

Answer 6 · 2022-01-31T01:35:16.000Z

Ahhhh, this makes sense. I apologize for my ignorance; I'm new to Logo (just got it a couple days ago to expose my son to some programming stuff) so I'm pretty unsure about a lot of things like this.

Thanks for entertaining my situation, and I'm sorry for wasting everyone's time.

Answer 7 · 2022-01-31T01:39:50.000Z

Hm, maybe we should add some examples in the logical operations section of the manual with "true and "false.

Answer 8 · 2022-01-31T01:45:13.000Z

That definitely wouldn't hurt. 👍