Module:Sandbox/Diriector Doc/Number format Source: en.wikipedia.org/wiki/Module:Sandbox/Diriector_Doc/Number_format

local p = {}
function p.formatNum(frame)
	local str = string.sub(frame.args[1], #frame.args[1] - 2, #frame.args[1])
	local temp = "      " .. string.sub(frame.args[1], 1, #frame.args[1] -3)
	for i = 0, #frame.args[1] - 3, 3 do
		str = string.sub(temp, #temp - 2 - i, #temp - i) .. frame.args[2] .. str
	end
    return str
end
return p