SparkFun Electronics Forum

hello evryone!
i`m a bit confused with the next thing. So i have x and y coords. I need do do an IF expression when both conditions are performed. Condition for X is when its in a range from 0,00 to 100,00 or over 230,00 and at the same time Y is in the range from 0,00 to 20,00 or over 180 then do {}

i`ve made it like

if (x<=100 || x>=230 && (y>=180 || y<20))

{
}

But you know its not working lika a charm...

Maybe there is a better solution for such logic like using an array? Im a newbie so don kick me too much))) Thanks guys!

Take a look at logical operator precedence and then decide if you are using the parentheses correctly.

Hint: since you are treating X and Y differently, for the same basic logical test, the answer is no.

You need more parenthesis:

if (x<=100 || x>=230 && (y>=180 || y<20))

if ((x<=100) || ((x>=230) && ((y>=180) || (y<20))))

You must be very precise about what comparison is being done where - leave no doubt.
Don't count on operator precedence, just brute force it.

You can, in fact, count on operator precedence. Guaranteed.

But most people don't bother to learn the rules that the compiler STRICTLY follows.

That's really what I was implying - don't count on what you may think you know about operator precedence.