Subtraction and addition

[Jordan27718208hgs0]

I am looking to have a formula to calculate both addition and subtraction.

I really want the formula to produce the difference between '"a" and "b"

So if field "b" has a value of 1 more than '"a" it returns a postive, if it is less than "a" to return a negative

Is this possible?

var a = this.getField("WeightOnTag.0.0 ").value;
var b = this.getField("PhysicalWeight.0").value;
event.value = a - b;

[Thom Parker]

Yes of course it is possible.  You only need to add a conditional to the code you already have. 

However, you haven't specified the complete condtions. 

diff = b-a  

diff > 1  :  Postive result

diff < 0 :  Negative result

what happens between 0 and 1 ? 

Read this:

https://acrobatusers.com/tutorials/conditional-execution/