ands and ors in ifs

[Jonny Tight Lips]

I just want to know how turing does the ands and ors in ifs.
For examlpe if I had:

if var1 = 2 and var2 = 3 or var3 = 4 then

does it do
var1 has to be true and var2 or var3 can be true
or
var1 and var2 have to be true or var 3 can be true

I hope you understadn what I'm talking about I know its a little confusing but I didn't know how else to explain it.

[Token]

okay, i'll try and use your example,

if var1 = 2 and var2 = 3 or var3 = 4 then


for that statement to work var1 AND var2 have to be true

or if var3 was true then it would work

the way i do it is look at each section as its own little if statement, for example

if var1 = 2 and var2 = 3 or var3 = 4 then

i separate the two different sections by the or statement. i'll give another example

if var1=1 and var2 =2 or var1 = 3 and var2 = 6 or var1 =5 then

i know its kind of confusing but what i do is say it in my head and think of it in litteral terms

[Drakain Zeil]

if x=y then
put "blah"
end if

When turring sees x=y it evaluates for a boolean (true/false).

You can't go:

if x=y or z or l then
put "blah"
end if

Since OR evaluates between two booleans, it doesn't repeat the "x=" bit. That's how you wish it worked.

All of the math evaluation signs (>.<.=) return boolean between two values of the same type, AND, OR, return boolean from two boolean arguments, and NOT changes that boolean to it's opposite.

[TheZsterBunny]

sometimes this part can be a bit confusing.

Most languages identify an if statement as a boolean value

i.e.

code:

var x := 5 if x = 5 then %true end if

if you are going to have multiple statements, why not bracket them about?

i.e.

code:

if x = 5 and (y = 6 or y = 12) and z = 13 then end if

will have a completely different effect than

code:

if (x = 5 and y = 6) or (y = 12 and z = 13) then end if

it also makes alot more sense when reading it.

never trust the order of operations.

-Z

[Jonny Tight Lips]

AH HA! Brackets. That the key. I didn't know you could use brackets in ifs. That makes life easyer. Thanx a lot!!

[person]

now for the brackets, dont do:

if var1 = (var3 or var4) then
%watever
end if

[ssr]

I remember learning this in school
first"not" then, "and" then comes "or"

try it