[Help] Any way to recieve a numerical result depending on the number in the dice roll?

Hello! I'm developing a homebrew system, I won't go deep on how the whole thing works out, but basically is based on the result of a d20 die. Basically, When the d20 rolls from 12 to 15 the player deals 1 point of damage, from 16 to 18 the player deals 2 and, lastly, when rolling a 19 deals 3 points of damage. I've read the "dice reference" article at the wiki (which had helped me a lot) but, with my non-coding experience, have not found a way to express it on Roll20. Is it possible? :< Thanks in advance.

You can achieve this using a rollable table , you'll need to set the weightings accordingly unless you need to know the actual result of the d20 as well in which case you'd set up 20 entries all with equal weighting.

Thank you!

You are very welcome... top tip: When a rollable table entry begins with a number it is treated as a die face, if you want to retain the roll of the d20 you can add 'tags' to the roll using [] ie: Side 1 = 0[1], Side 2 = 0[2] etc etc... then when you roll on the table and hover over the result you'll see the tag and know exactly what was rolled.

That's a useful tip!