converting negative numbers to 1

[Aikikame]

Is there a way in the expression editor to convert numbers that are negative to 1?

let's say P1 ATK - P2 DEF = P2 Damage,
P1 ATK = 6
P2 DEF = 9
therefore 6 - 9 = -3

I want this -3 changed to a 1 so that if I subtract it from a value (P2 HP)it doesn't say that a negative minus a negative equals a positive and add HP where it should be removing it. Any help would be great. Thanks

[Hernan]

Use max(). It will return the highest of 2 numbers.
E.g.: max(P1 ATK - P2 DEF , 1)
Note that a 0 would become 1 too.

[Jax]

If that isn't ok, you could use the IIF object.

[Aikikame]

Thanks guys.
using max() worked a treat. I've been wondering how to pull this one off for a while to be honest. Thanks again.

[Jaffob]

Using max() as Hernan explained it wouldn't work perfectly, although it might suit your needs. That method will just set a number to 1 if it's lower than 1, so 0 or 0.5 for example will return 1 as well. But that might not be a problem depending on what you're doing.