You can use the AND logic block to connect to conditions together. But how can x+y+z be > ve and > -ve? Did you mean to turn around one of those inequalities?

If youâ€™re stuck, post a screenshot of what youâ€™ve tried and someone can probably help you fix it.

I dont have a condition setup yet for that. I was stuck at how to.

I can explain a little further so you get the idea.

The app has a few text boxes for some fuel figures from different tanks. Once a calculate button is clicked the app calculates the various uplift figures and discrepancies. I have managed to do that much. Now the issue is as follows

Eg: discrepancy is calulated by app

The limit discrepancy can be is within (+ or -) y

Now y= 0.0072(A) + 537.5
Where A is one or the text box values in the app called final fuel on board.

If lets say (A) = 100000
So if we get discrepancy as +2000 from the app. Based on the â€śyâ€ť calculation, discrepancy is > y so error message shown.

But the same must be true of the discrepancy is -2000 as well. This is where i am having a problem. Coz this y equation is only gonna give me a +ve value so its easy to put a condition for the +2000 (for eg). Ut how do i also set it up for the -2000?

I think this is what you mean. Assume the
PL = +ve Limit is 10 and NL = -ve limit is -10 then
if (x+y+z) > 0 & (x+y+z) > PL) Error Out
if (x+y+z) < 0 & ABS(x+y+z) > ABS( NL)) Error Out
ABS means absolute value

& means â€śandâ€ť

All the above conditional checking can be easily done with Thunkable