Display Polycount

For the bridge option we need to have the same number of vertices in both border edges right ??

so how can i find the number of vertices i selected ???
Is it manually i have to count the selected vertices…???

Any option here in blender which displays the Polycount…

Not sure what you’re talking about (bridge?), but the number of vertices selected is shown on the top line of the blender interface: something like:

Ve: 46-468 … which means 46 vertices selected from a mesh with 468 total vertices.
Ed: … means edges
Fa: …means faces

depending on which selection mode you’re in.