I can't believe that this problem is stumping me, but stumped me it has. All I'm trying to do is use the field calculator to derive a difference between the numbers (double) in two columns. The numbers are all over the place; I can't do a subtraction, I'm just looking for the delta.
There is an Abs() visual basic function, but I can't find any documentation on how it should work, or on whether it works the way that abs() in python does.
If someone can explain which of the functions in Field Calculator I can use to derive a numerical difference, I'd appreciate it.
I'm on ArcGIS Desktop 10.5 by the way.