Can some one help to find Rnd button in grasshopper?

Hi, All
I am learning some tutorial, and can not find the location of this button image . Could anyone help to address its location for me? I think it should come from some plug-in I don’t know.
Many thanks

I think that’s the random component in an older version of GH
You can find it using #random

Thanks! I find it!

Hi, Lin
I found that , Rnd is one part of plug-in called ‘Generation’. The image is below
Hope this can help others who meet same prob

There is a random component in Legacy Grasshopper
On Sets->Sequence

Hi, Laurent
Thanks for let me know this button!
I acturally know this and I am studying on another add-on called LOOP, so I have this question.
Anyway, thanks!