Script won't print out "What" for some reason

[Uti_ba]

Hey all! I’m trying to figure out why my part of my script won’t run as intended. This is what it looks like.

local Part = game.Workspace.MyPart

local function BestFunction()
	local BestNumber = 15
	local FavoriteNumber = 10
	print(BestNumber+FavoriteNumber)
end

Part.Transparency = 0.4

local function Ghost()
	if Part.Transparency == 0.4 then
		print("What")
	end
end

BestFunction()
Ghost()

It prints out the “25” however it doesn’t print out “What” even though the part transparency is 0.4. Can anyone help?

[dthecoolest]

When dealing with decimals if you learnt computer science it’s a floating point number and the computer basically stores it as 0.40000009 from what I remember.

Is floating point math broken?

Basically equality is unreliable when decimals come into play.

Better to use > or < instead but there is also the method below which should work.

What is the best way to implement an equality check on floating point inaccuracies?

The best way is to avoid equality checks on floating points if you can help it. However, if you must, the best way to do it to my knowledge is to get a certain precision on the floats you want to compare, then compare those numbers. local function compare(float1, float2, precision) precision = 10^precision return math.floor(float1 * precision) == math.floor(float2 * precision) end print(compare(0.20000000298023, 0.20000000298023, 10), "true")

[AceBookMarker]

local Part = workspace.MyPart--Or script.Parent and move in part

local function BestFunction()
	local BestNumber = 15
	local FavoriteNumber = 10
	print(BestNumber+FavoriteNumber)
end

Part.Transparency = 0.4

local function Ghost()
	print(Part.Transparency)
	if Part.Transparency == 0.4 then
		print("What")
	end
end

BestFunction()
Ghost()

What was old property?

[Uti_ba]

Hi! Just changed the symbol to the “>” symbol and changed the 0.4 to a 0.5 in the function. Thanks so much!