a script i found and i have a question i wanna know?

i have seen scripts like

function createJoint(wp0, wp1, wc0x, wc0y, wc0z, wc1x, wc1y, wc1z, name)
	local joint = Instance.new("Motor6D", wp0)
	joint.Part0 = wp0
	joint.Part1 = wp1
	joint.C0 = CFrame.new(wc0x, wc0y, wc0z)
        joint.C1 = CFrame.new(wc1x, wc1y, wc1z)
        joint.Name = name
	return joint
end
**

now when i saw "return joint" i was confused, can someone tell me what does it do when it returns to joint?

return will return the object created in the function to the assigned variable. For example, say I wanted to create a function that makes a new part and assigns it a random color. Instead of writing it out everywhere I wanted to make the part, I could just have a function return that part. For example:

function makePart()
	local part = Instance.new("Part")
	part.Parent = workpace
	part.Color3 = Color3.new(math.random()) --Gives brick a random color
	return part --Returns the part as the assigned variable
end

local PartWithRandomColor = makePart() --Would fire the function and the variable would assign to what it returns

Getting more complicated:

This is an example of how to use return to get multiple variables. We will get the floor and ceil of a given number (round up and round down)

function Round(number)
	local roundUp = math.ceil(number)
	local roundDown = math.floor(number)
	return number,roundUp,roundDown --Returns the rounded up and the rounded down version of 	the number
end

local OriginalNumber,RoundedUp,RoundedDown = Round(math.random()*math.random(1,100)) --Puts a random number through the function
print(OriginalNumber.." was rounded up to "..RoundedUp.." and rounded down to "..RoundedDown.."!") --Prints results

I hope this clears up your question.

I can try to explain it but with a simpler example. The return function returns whatever is inputted, as a result from a function.

Here's an example:

function trueOrFalse()
	if math.random(0,1) == 0 then
		return false
	else
		return true
	end
end

print(trueOrFalse()) -- prints either "true" or "false"

In the example the result of the trueOrFalse function will be either true or false, as the name suggests. Now whenever I put trueOrFalse() in my code it will be a more of a value. With the value being either true or false.