module script won't recognize return statement? [SOLVED]

I think your confused on what return does. Return returns a value for the current function. It doesn't stop all layers of functions - only the one it is on.

Here is an example.

function exampleFunction()
	print("Hello universe!")
	return
end
print("Hello world!")
exampleFunction()
print("Hello galaxy!") -- This will print

You can fix this by making the return value false. Here is an example.

Table script:

local ItemModule = {}
local itemFolder = game.ServerStorage.ItemStorage

ItemModule.ItemStorage = { -- For cloning into the players backpacks in item module's scripts.

    ["Sample"] = itemFolder.Sample

}

function ItemModule.inventoryData(backpack, starterGear) -- Sharing variables between this script and all item modules scripts.

    ItemModule.BackpackItems = {

        ["BackpackSample"] = backpack:FindFirstChild("Sample"),
        ["StarterSample"] = starterGear:FindFirstChild("Sample")

    }

    local item = ItemModule.BackpackItems

    if (item["BackpackSample"] ~= nil) or (item["StarterSample"] ~= nil) then
        print("item already exists!") -- this prints out, but the return doesn't work.
        return false
    end
end



return ItemModule

Item giver script:

local ItemModule = {}
local module = require(game.ServerStorage.ItemTable)
local itemFolder = game.ServerStorage.ItemStorage
local item = itemFolder.Sample -- Chosen item, makes creating other scripts easier. (because it uses this single variable!)

function ItemModule.itemFunc(player)
    local backpack = player.Backpack
    local starterGear = player.StarterGear
    local check = false

    local doReturn = module.inventoryData(backpack, starterGear)  -- inventorydata function runs here.
    if not doReturn then return end

    local itemClone = item:Clone()
    local itemCloneBackup = item:Clone()

    itemClone.Parent = player.Backpack -- Clones to player's backpack.
    itemCloneBackup.Parent = player.StarterGear -- Clones to player's StarterGear (so if they die, they'll still have it).
end

return ItemModule