My math.floor is rounding up help?

im trying to display my Number Value with a IntValue, im not trying to have decimals while displaying. but my math.floor isnt working, help? my math.floor is rounding up. .5-.9 goes up to the next integer

local function round(n)
    return math.floor(n)
end

while true do
    round(NCookies.Value)
    ICookies.Value = NCookies.Value
    CookieCounter.Text = (ICookies.Value).." cookies"
    wait()
end