A function that returns a random integer from range [min; except) ∪ (except; max]

RandomIntWithExcept.lua

local function RandomIntWithExcept(min: number, max: number, except: number?): number
	if except then
		local len = max - min + 1
		return (math.random(1, len-1) + except - min) % len + min
	else
		return math.random(min, max)
	end
end