How can I round numbers?

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#1

Hey Everyone,
So I’m making a health GUI for my story game. It works fine, but when a player looses health, it will often display the numbers as huge decimals, e.g. 62.3922525. This is a problem. I want to make it so that it will only show whole numbers, so instead of 62.3922525 it will just show 62.
Here is my script:

Player = game.Players.LocalPlayer

repeat wait() until Player.Character

script.Parent.TextLabel.Visible = true

Player.Character.Humanoid:GetPropertyChangedSignal('Health'):Connect(function()
	script.Parent.TextLabel.Text = 'Health: '..Player.Character.Humanoid.Health
end)

How can i achieve this?
It’s a local script. Thanks for any help!

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#2

check if the tenths place through a script in the decimal is greater than or equal to 5, then use math.ceil, if not, math.floor
Ex: 6.932992382832 math.ceil = 7% health
Ex2: 5.11111189238028283 math.floor = 5% health

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#3

How could I add this to my script?

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#4 
local function round(number)
   return math.floor(number + 0.5)
end

local num = round(3.456)
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#5

^ this

But I would do:

function Round(n, decimals)
	decimals = decimals or 0
	return math.floor(n * 10^decimals) / 10^decimals
end

print(Round(math.pi, 3)) -- pi as example because it's a long number

For more freedom if you would ever want a certain amount of decimals behind the rounded number.

5 Likes
#6

Yeah, but I don’t know how many decimals there are, as it’s health, it entirely depends.

1 Like
#7

No, I mean, it’s how many decimals to include in the result.

n = 3.14159 with Round(n, 2) would give you 3.14
n = 3.14159 with Round(n, 0) would give you 3

1 Like
#8

Will this work?

Player = game.Players.LocalPlayer

repeat wait() until Player.Character

script.Parent.TextLabel.Visible = true

function Round(n, decimals)
	decimals = decimals or 0
	return math.floor(n * 10^decimals) / 10^decimals
end





Player.Character.Humanoid:GetPropertyChangedSignal('Health'):Connect(function()
	script.Parent.TextLabel.Text = 'Health: '..Round(Player.Character.Humanoid.Health,0)
end)
2 Likes
#9

Remember that there’s an event signal specifically for when the health is changed. But yes, that’s not completely off either.

I’d however do it like this:

local LocalPlayer = game.Players.LocalPlayer
local Character = LocalPlayer.Character or LocalPlayer.CharacterAdded:Wait()
script.Parent.TextLabel.Visible = true

--||	Functions
function Round(n, decimals)
	decimals = decimals or 0
	return math.floor(n * 10^decimals) / 10^decimals
end

function HealthChanged(NewHealth)
	script.Parent.TextLabel.Text = 'Health: ' .. tostring(Round(NewHealth)) -- you don't need to include a decimal if you want none
end

--||	Connections
Character:WaitForChild("Humanoid").HealthChanged:Connect(HealthChanged)
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#10

Why did you remove the solution mark from my post and mark your own post as the solution?

2 Likes
#11

Oops sorry, I was having a look as I needed it for my old game and must have accidently done this. Apologies.

2 Likes
#13

For additional functionality I like to use an implementation that lets you set the base number to something other than 10.

local module = {
	e = math.exp(1),
	pi2 = math.pi * 2
}

function module.isReal(n)
	return ((typeof(n) == "number") and (n == n) and (math.abs(n) ~= math.huge))
end

function module.isInt(n)
	return module.isReal(n) and (math.floor(n) == n)
end

function module.round(x, degree, base)
	assert(module.isReal(x), "Input must be a real number.")
	if (degree ~= nil) then
		assert(module.isInt(degree), "Degree must be an integer.")
	else
		degree = 0
	end
	if (base ~= nil) then
		assert(module.isInt(base), "Base must be an integer.")
		assert((base > 0), "Base must be greater than zero.")
	else
		base = 10
	end
	local n = base ^ degree
	return math.floor(x * n + 0.5) / n
end

return module

That way you can do stuff like round to the nearest 5 or any integer.

print(module.round(math.pi, 2)) -- 3.14
print(module.round(module.e, 1)) -- 2.7

print(module.round(23, -1, 5)) -- 25
print(module.round(58, -1, 11)) -- 55
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