How do I make the value in an attribute increase by one?

[Rymxi (gav1n)]

Idk if this is some easy stuff that im just simply to dumb to figure out, but how would I go about increasing the value in an attribute by one?

COMBAT_REMOTE.OnServerEvent:Connect(function(player)
	local character = player.Character
	local Torso = character:WaitForChild("HumanoidRootPart")
	local Combo = player:SetAttributeAttribute("Combo", 1) 
	local function genhitbox()
		local hitbox = game.ReplicatedStorage.Hitbox:Clone()
		hitbox.Parent = character
		hitbox.CFrame = Torso.CFrame*CFrame.new(0,0,-3.5)
		hitbox.CanCollide = false
		hitbox.Anchored = true
		wait(0.3)
		hitbox:Destroy()
	end
	if player:GetAttributeAttribute("Stunned") == nil and player:GetAttribute("Blocking") == nil then
		player:SetAttribute("Combo", )
	end

end)

im trying to make the combo go up 1 everytime the event is fired and the attributes are nil. But it never works,
I’ve tried to do
“Combo = 1”
and then increase it using that,
but when one person hits and another person hits, person B’s combo is 2.

if you need video context just lmk.

[cakeycocoa (StarvinMarvin)]

player:SetAttribute("Combo", player:GetAttribute("Combo") + 1)

Nvm I don’t think this would work since your title (which I was answering) doesn’t really match the post.

[sky10]

Before you set the attribute you can use local var = object:GetAttribute(“Combo”) + 1

I can’t remember if it’ll error because the attribute may not be numeral, if it errors you can make it a numeral value by

tonumber()

Like this
local var = tonumber(object:GetAttribute(“Combo”)) + 1

Then set the attribute to the new var

(sorry hard to be more detailed on my mobile)

[2112Jay]

increase by 1

local combo = player:GetAttribute("Combo") or 0
player:SetAttribute("Combo", combo + 1)

“im trying to set the combo from 1 to 2”
or just

player:SetAttribute("Combo", 2)

Also your script says: player:GetAttributeAttribute(“Stunned”)==nil
It Should be: player:GetAttribute(“Stunned”)==nil

if player:GetAttribute("Stunned")==nil and
	player:GetAttribute("Blocking")==nil then
	player:SetAttribute("Combo", 2)
end

[txcIove]

local maxNumber = 2 -- set this to what you want the highest number to be
local currentComboNumber = player:GetAttribute("Combo")

if currentComboNumber >= maxNumber then
    player:SetAttribute("Combo", 1)
else
    player:SetAttribute("Combo", player:GetAttribute("Combo") + 1)
end

[Rymxi (gav1n)]

Not at my PC rn but to add upon my question:
Some left out stuff; I want it to increase by 1 everytime the event is fired.

(Note: I havent gotten the chance to see if any of your offered solutions work so they may help)

[Rymxi (gav1n)]

21:53:49.188 ServerScriptService.Combat Server:19: attempt to perform arithmetic (add) on nil and number - Server - Combat Server:19

[MrArsikk (Arsikk)]

I suppose you were trying to do player:GetAttribute("Combo") + 1 while it is nil. You should do something like that:

-- other code
else
    if player:GetAttribute("Combo") == nil then player:SetAttribute("Combo", 0) end -- if nil, set to 0
    local val = player:GetAttribute("Combo") + 1
    player:SetAttribute("Combo", val)
end

[Rymxi (gav1n)]

this helps but i found another issue,
im using a remote on a server script to find the player.
and everytime i fire it, it sets the player back to combo value 0. i tried to put the actual set combo on a different script but it didn’t work. Here’s the script:

local COMBAT_REMOTE = game.ReplicatedStorage.COMBAT_REMOTE

COMBAT_REMOTE.OnServerEvent:Connect(function(player)
	local character = player.Character
	local humanoid = character:WaitForChild("Humanoid")
	local Torso = character:WaitForChild("HumanoidRootPart")
        local Combo = humanoid:SetAttribute("Combo", 0)
	local val = humanoid:GetAttribute("Combo")
	local function genhitbox()
		local hitbox = game.ReplicatedStorage.Hitbox:Clone()
		hitbox.Parent = character
		hitbox.CFrame = Torso.CFrame*CFrame.new(0,0,-3.5)
		hitbox.CanCollide = false
		hitbox.Anchored = true
		wait(0.3)
		hitbox:Destroy()
	end
	humanoid:SetAttribute("Combo", val + 1)
	print(val)
	end)

if it is possible to put this on a local script that would be great. (im relatively new to scripting sorry if this is obvious stuff lol.)

[sky10]

local COMBAT_REMOTE = game.ReplicatedStorage.COMBAT_REMOTE
local Combo = humanoid:SetAttribute("Combo", 0) --/!!/  Default starting value for the attribute, gets set as soon as script is spawned unless in a function, then it will run everytime when the function runs

--/!!/  Note for above you don't even need this line if you set the default value to 0 for the Attribute in the explorer.

COMBAT_REMOTE.OnServerEvent:Connect(function(player)
	local character = player.Character
	local humanoid = character:WaitForChild("Humanoid")
	local Torso = character:WaitForChild("HumanoidRootPart")
	--local Combo = humanoid:SetAttribute("Combo", 0) --/!!/  Moved above function so it doesn't run every time function is ran

	local increasedCombo = humanoid:GetAttribute("Combo") + 1 --/!!/  this gets the current value of the attribute and should increase it by 1
	print(increasedCombo)

	local function genhitbox()
		local hitbox = game.ReplicatedStorage.Hitbox:Clone()
		hitbox.Parent = character
		hitbox.CFrame = Torso.CFrame*CFrame.new(0,0,-3.5)
		hitbox.CanCollide = false
		hitbox.Anchored = true
		wait(0.3)
		hitbox:Destroy()
	end

	humanoid:SetAttribute("Combo", increasedCombo) --/!!/  Here it sets the Attribute to the increasedCombo variable


	end)

If something like attempt to perform arithmetic (add) on string and number appears than you’ll need to do local increasedCombo = tonumber(humanoid:GetAttribute("Combo")) + 1

[RobloxHasTalentR (LOLLLLLLLLL_1)]

COMBAT_REMOTE.OnServerEvent:Connect(function(player)
  local character = player.Character
  local Torso = character:WaitForChild("HumanoidRootPart")

  if player:GetAttribute("Stunned") == nil and player:GetAttribute("Blocking") == nil then
    local currentCombo = player:GetAttribute("Combo") or 0
    local newComboValue = currentCombo + 1
    player:SetAttribute("Combo", newComboValue)

    local function genhitbox()
      local hitbox = game.ReplicatedStorage.Hitbox:Clone()
      hitbox.Parent = character
      hitbox.CFrame = Torso.CFrame*CFrame.new(0,0,-3.5)
      hitbox.CanCollide = false
      hitbox.Anchored = true
      wait(0.3)
      hitbox:Destroy()
    end

    genhitbox()
  end
end)

[Rymxi (gav1n)]

much appreciated bro!, (also sky10) much appreciated. both worked, thank you!