Rename Canvas in a special format/order?

Hey all, looking for some guidance please on this. I would like to modify this code so it would take the existing name of a canvas and prefix it with a number in this type of format ‘##.##’. So the end result would be:

Old canvas name:

New canvas name:

The code I have currently just renames each Canvas to Canvas 1 … 2… 3… etc.

CanvasLib.renameEveryCanvasToMatchOrder = function(){
cvss = canvases.reverse()
for(i = 0; i < cvss.length; i++){
index = i + 1
canvases[i].name = 'Canvas ’ + index