Mathematical Sequence

Hello, I would like to use sheetworker in order to make my xp_max function respond to this mathematical sequence :  where x is the lvl. When you are lvl 1, you need 100 xp to lvl up  when your are lvl 2 you 200 more, so in total its 300 etc... The problem is that even when I try to follow the examples, and everything I don't manage to set the value of a attr using the sheetworker, I'm very far from the programming field so I may just doing stupid mistake. Can you help me set up this one ? If I can provide any further information for you to help solve this little problem, please let me know !

Isnt this a continuation of this thread: <a href="https://app.roll20.net/forum/post/11117578/mathematical-sequence" rel="nofollow">https://app.roll20.net/forum/post/11117578/mathematical-sequence</a> ? What sheet worker code have you tried so far (in text not a screenshot)? Are you trying to have xp_max show the maximum xp for whatever level you choose?

If I understand what you're asking, this should do it. It assumes that level is always a positive integer. &nbsp;&nbsp;&nbsp;&nbsp; on ( 'change:level' , () =&gt; { &nbsp; &nbsp; &nbsp; &nbsp; getAttrs ([ 'level' ], v =&gt; { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; const level = + v . level || 0 ; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; const triangle = level * ( level + 1 ) / 2 ; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; const xp_max = triangle * 100 ; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; setAttrs ({ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xp_max &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }); &nbsp; &nbsp; &nbsp; &nbsp; }); &nbsp; &nbsp; &nbsp;});

Sorry I haven't be very reactive I had unexpected stuff to do, I'll try this out

Hey, Sorry again, I manage to find more time today on('change:lvl', () =&gt; { getAttrs(['lvl'], v =&gt; { const lvl = +v.lvl || 0; const triangle = lvl * (lvl + 1) /2; const experience_max = triangle * 100; setAttrs({ experience_max }); }); }); I changed it to this cause my level variable is @{lvl} and xp variables are @{experience} and @{exeperience_max} Nevertherless, it doesn't seem to work&nbsp;