How to prevent intvalue from going below 0

Help and Feedback Scripting Support
#1

Hello!

I’m making a city game, and there’d be a button where you could increase a intvalue. I made a script so it could change the intvalue, but prevent it from going into the negatives. However, when I tried to do it, it didn’t work. Thanks for helping:

local replicatedstorage = game:GetService("ReplicatedStorage")
local TaxEvent = replicatedstorage:WaitForChild("TaxEvent")
local Taxes = replicatedstorage:WaitForChild("Taxes")

local function changenum(player, num)
	if player.Team == game.Teams.Leader then
		if Taxes.Value  >= 0 then
			Taxes.Value = Taxes.Value + num
		end
	end
end
	
TaxEvent.OnServerEvent:Connect(changenum)

The intvalue is in replicatedservice.

#2

Is it possible that num is negative?

#3

Yes, it’s negative, I want the intvalue to be able to subtract or add.

#4

Instead of Taxes.Value >= 0, do the following:

if Taxes.Value+num >= 0 then
    Taxes.Value+=num
else
    Taxes.Value=0
end
#5 
local function changenum(player, num)
	if player.Team == game.Teams.Leader then
       if (Taxes.Value + num) < 0 then
          Taxes.Value = 0
       else
          Taxes.Value += num
       end
	end
end

This code will add/subtract num to/from Taxes, but won’t go under 0

#6

It doesn’t allow me to increase, but when I go to -10, it goes back to 0.

1 Like
#7

Add this in your current script:

Taxes.Changed:Connect(function()
   if Taxes.Value < 0 then
      Taxes.Value = 0
   end
end)

This detects whenever the Taxes value changes, and if it’s below 0, turns it to 0.

3 Likes
#8

You can do what @NeoGaming_RBLX did or you can do this (not sure if it works cause I haven’t tested it) if it’s the only script that adds the value of Taxes

local replicatedstorage = game:GetService("ReplicatedStorage")
local TaxEvent = replicatedstorage:WaitForChild("TaxEvent")
local Taxes = replicatedstorage:WaitForChild("Taxes")

local function changenum(player, num)
	if player.Team == game.Teams.Leader then
        Taxes.Value = math.clamp(Taxes.Value + num, 0, math.huge)
	end
end
	
TaxEvent.OnServerEvent:Connect(changenum)
#9

Fixed the code, I put a minus instead of a plus by mistake

local function changenum(player, num)
	if player.Team == game.Teams.Leader then
       if (Taxes.Value + num) < 0 then
          Taxes.Value = 0
       else
          Taxes.Value += num
       end
	end
end
#10

math.clamp would be better to use here instead of checking if Taxes is below 0

2 Likes
#11

Can you give an example? I’ve never used math.clamp.

#12

ok here, let’s say there’s a count variable that the value is 0, a minimum variable that’s 0, and a maximum variable that’s 20. Then we add 10 to count 5 times so it becomes 50, right? Well, math.clamp stops that from going to 50 and just limits it to the minimum and maximum variable so it can neither go below 0 or above 30.

local count = 0
local minimum = 0
local maximum = 30

for i = 1, 5 do
    count = math.clamp(count + 10, minimum, maximum) -- doesn't add anymore after the third loop
    print(count)
end
2 Likes