string.gsub() Changing a number value on Touch?

Here are the steps: 1. First, add a RemoteEvent into ReplicatedStorage and name it to bookCollected 2. Second, add a LocalScript into the text you are displaying this in 3. Third, add a ServerScript into the books

Here's the code:

ServerScript inside the book Object

script.Parent.Touched:Connect(function(hit)
    if game.Players:GetPlayerFromCharacter(hit.Parent) then
        local player = game.Players:GetPlayerFromCharacter(hit.Parent)

        game.ReplicatedStorage.bookCollected:FireClient(player)
    end
end)

LocalScript:

local text = script.Parent
local booksFound = 0 -- by default unless you save it, I'll let you deal with that since it isn't related to the question

game.ReplicatedStorage.bookCollected.OnClientEvent:Connect(function()
    booksFound = booksFound + 1

    if booksFound < 4 then
        text.Text = 'Books Found ' .. booksFound .. '/4'
    else
        text.Text = 'Books Found 4/4'

        -- Add additional code to do when quest is complete
    end
end)

That should do the job!

Like I stated before, if your text label is a fixed “0/4 Quests” then you should use ‘string.gsub’ There are patterns and the one your looking for is ‘%d’ which finds the first number in a text/string.

Here’s an example:

local textlabel = script.Parent — this label will have an example text like “0/5 Found”

if player_found_quest then
    local number = tonumber(textlabel.Text:match(‘%d’)) — this will give you ‘0’ since it is the first digit of that text
    textlabel.Text = string.gsub(textlabel.Text, ‘%d’, tostring(number+1))
end

— this will add 1 to the text for example: “1/5 Found”