[Macro Help] Set a minimum value within equation (Dungeon World)

I am using the following macro when GMing Dungeon World to handle attacks by monsters against PCs: /em @{selected|token_name} attacks @{target|token_name} for [[@{selected|dtype}-(@{target|armor}-@{selected|piercing})]] damage Obviously this requires adding an attribute to the journal called "piercing" for all monsters (often set to 0). The problem is if a monster has 2 piercing and a character only has 1 armor, this will result in additional damage, which is not how the ability is supposed to work. So is there a way to modify the macro so that the result of (@{target|armor}-@{selected|piercing}) can never be lower than 0? Thanks!

You should be able to use this: /em @{selected|token_name} attacks @{target|token_name} for [[@{selected|dtype}- { (@{target|armor}-@{selected|piercing}) ,0}kh1 ]] Wiki Link on  Keep/Drop Groups

Thanks! I saw that in some searching, but I must have misinterpreted the functionality because I thought that would only apply to dice rolls, not subtracting static values. However, I just tested that by entering: [[{(2-7),0}kh1]] And I see that it does work - I really appreciate the help! EDIT: I ultimately ended up modifying it to the version below so that it also won't display less than 0 damage in the event that armor is greater than the total damage rolled: /em @{selected|token_name} attacks @{target|token_name} for [[{(@{selected|dtype}-{(@{target|armor}-@{selected|piercing}),0}kh1),1d0cs>1}kh1]] damage

Is there any way to make this work with floor()? I keep trying to do it with an inlaid roll, but I keep getting an error (TypeError: Cannot read property 'substring' of undefined) [[{floor(@{level}/4),1}kh1]] What did I do wrong?

Shin Von Nibelung said: Is there any way to make this work with floor()? I keep trying to do it with an inlaid roll, but I keep getting an error (TypeError: Cannot read property 'substring' of undefined) [[{floor(@{level}/4),1}kh1]] What did I do wrong? Attribute calls (e.g. @{AC}) that are not placed within one of tabs of a Character Window (e.g. within a field on the Character Sheet Tab or within an Ability on the Attributes & Abilities Tab ) must use a keyword to let the parser know which Character you intend to call that Attribute from (e.g. @{selected|AC}). Using a Selected Token with a Macro Using a Targeted Token with a Macro Adding a keyword to your Attribute call might solve your issue.