What do the numbers for defining mesh faces mean? E.g. Q{30;27;23;26}

[Quan_Li]

One of the results of the Deconstruct Mesh component is Mesh Faces.
Grasshopper defines mesh faces using integers after Q.
I am trying to understand what the Q and numbers mean here.

Thanks!

[diff-arch]

The V output provides an indexed list of vertices. Each mesh face - in your case - is defined by four vertices and refers to them by index. That’s cheaper than storing a separate copy of a three-dimensional point.

[Quan_Li]

I understand now, Thanks!