Monitor for my xp turtle

Hello, I have made an xp farm where I have a turtle that picks up xp and enchants books for me and i'm trying to hook up a monitor to it. The problem is that I don't know how to center the text and remove the .0 after the level from the monitor, here is the code I have right now.

m = peripheral.wrap("right")
monitor = peripheral.wrap("top")
local o = nil
m.setAutoCollect(true)
while true do
if m.getLevels() > 29 then
  turtle.select(1)
  turtle.suck()
  turtle.drop(turtle.getItemCount(1)-1)
  m.enchant(30)
  turtle.drop()
else
  o = m.getLevels()
  monitor.setCursorPos(1.5, 1.5)
  monitor.setTextScale(2.5)
  monitor.write(o)
  sleep(10)
end
end

I searched the forum for help before posting but I didn't get the problem solved since I've never coded before.

Split into new topic.

To center the text in the monitor, add this at the beginning of your code:

function centerPrint(sText)
   local mon = peripheral.wrap("right")
   term.redirect(mon)
   local x, y = term.getCursorPos()
   local w, h = term.getSize()
   term.setCursorPos(1 + ((w - sText:len()) / 2), y)
   print(sText, textColor, backgroundColor)

   term.restore()
end

Then, if you want to write something in the monitor just to centerPrint("your text") and it will print your text centered on the monitor on right side.

This is an simpel solution, there is probably something better, but this will work for now.

local level = tonumber(tostring(m.getLevels()):sub(1, tostring(m.getLevels()):find('%.') - 1))