Round

Adds a function to the math library to round a number (num) to any optional number of decimal places (idp).

math.round(num, idp)

function math.round(num, idp)

	assert(tonumber(num), 'Round expects a number.')

	local mult = 10 ^ (idp or 0)
	if num >= 0 then
		return math.floor(num * mult + 0.5) / mult
	else
		return math.ceil(num * mult - 0.5) / mult
	end

end