var gives 2.0 when written and not 2

why when i do this:

local mon = peripheral.wrap("back")
qnum = 1
qnum = qnum + 1
mon.setCursorPos(9, 6)
mon.write(qnum)

i get 2.0 on the screen and not 2?
i know that in c# you can do a num and not a normal var but i dont know to do that on lua.

thanks!

btw i need the answer fast plz.

You can format it into a single digit with string.format, like this

mon.write(string.format('%d', qnum))

using tostring should work too:

mon.write(tostring(qnum))

worked! thanks.
MysticT's answer is shorter so i used that but thanks faubiguy :)/>