A WoW script that provides two functions to play a random sound from a list.

randomSounds.lua

local soundFiles = { -- These are example files only
	"Sound\\Creature\\SomeCreature\\SomeCreature_Aggro01.ogg",
	"Sound\\Creature\\OtherThing\\OtherThing_Greeting01.ogg"
	"Interface\\AddOns\\MyAddOn\\Sounds\\levelup1.ogg"
}

local numSounds = #soundFiles -- Get the number of entries in the soundFiles table

local function PlayRandomSound()
	local index = random(1, numSounds) -- Generate a random number between 1 and numSounds to use as an index. random is an alias of the math.random function
	local path = soundFiles[index] -- Get the path at the generated index
	PlaySoundFile(path) -- Play the sound file
end

local function PlayRandomSoundAbbrev() -- This is a shorter version of the function above that does the exact same thing
	PlaySoundFile(soundFiles[random(1, numSounds)])
	-- The above line performs each "task" in the same order as the first function (function call, table lookup, function call),
	-- but passes the result of the "task" directly to the next one instead of explicitly storing the result in a local variable first
end