Need some help, would anyone be able to tell me why the command {{((characterlevel/5)@rounddown)+2}} is not working for an ability in my homebrew race? what am I missing?

Snippets don't "do" anything. There's an alternate way of displaying text as it appears on the sheet. It only works in the Snippet box.

Then why does {{ characterlevel+2}} work fine?

Snippets don't work outside the snippet box so I'm not sure I am understanding you correctly.

 As for the code itself: {{(characterlevel/5) @rounddown +2}}

That should do what you want.

Sorry, it is in the snippet box, my problem is when I try adding that divide by five and round down part the number doesn't show up. 

When I have it as {{characterlevel+2}} this text says "You do an extra 3 radiant damage"

When I have it as {{(characterlevel/5) @rounddown +2}} this text says "You do an extra   radiant damage"

Quote from Corvat >>

Sorry, it is in the snippet box, my problem is when I try adding that divide by five and round down part the number doesn't show up. 

When I have it as {{characterlevel+2}} this text says "You do an extra 3 radiant damage"

When I have it as {{(characterlevel/5) @rounddown +2}} this text says "You do an extra   radiant damage"

 
Weird, because it worked for me. When my test character was level 2 it said 2, when it was level 10 it gave 4.

Since it was working perfectly for me, I cannot help you.

Quote from Corvat >>

Sorry, it is in the snippet box, my problem is when I try adding that divide by five and round down part the number doesn't show up. 

When I have it as {{characterlevel+2}} this text says "You do an extra 3 radiant damage"

When I have it as {{(characterlevel/5) @rounddown +2}} this text says "You do an extra   radiant damage"

 Have you double checked for typos?

Wait, you said that “When I have it as {{characterlevel+2}} this text says ‘You do an extra 3 radiant damage.’" Does that mean you have a level one Character? If that’s the case try adding “#min:1” in there. At least I think it’s a “#” it might be an “@“ I don’t really remember.

The problem with having Min:1 is that it would always be 1 + 2, meaning 3, until Level 10. I think the intention of the level / 5 with +2 is so that it is 2 until level 5 which then becomes 3 until level 10 where it becomes 4, 15th level would be 5 and 20th level would be 6.

'Course, if that's the case, just setting it to be equal to Proficiency bonus would be a lot simpler and automatically scales from +2 'til 5th, then +3 and so on to +6. The increases happen slightly earlier, but still scales well (better in my opinion) and will be easier to implement and a LOT easier in snippet code.

Perfect thank you I didn't think of that