Index Nil error with Variable 'StateChanged'

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1

Hey There, Recently I was trying to develop a script to make my StarterPlayer be able to double jump when the Player clicks his space-bar key twice, but I’ve got a error that it’s declaring that my variable ‘StateChanged’ is a index nil - Line 31.

local UserInputService = game:GetService("UserInputService")
local player = game:GetService("Players").LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid character:WaitForChild("Humanoid")

local MAX_JUMPS = 2
local TIME_BETWEEN_JUMPS = 0.2
local numJumps = 0
local canJumpAgain = false

local function StateChanged(oldState, newState)
	if Enum.HumanoidStateType.Landed == newState then
		numJumps = 0
		canJumpAgain = false
	elseif Enum.HumanoidStateType.Freefall == newState then
		wait(TIME_BETWEEN_JUMPS)
		canJumpAgain = true
	elseif Enum.HumanoidStateType.Jumping == newState then
		canJumpAgain = false
		numJumps += 1
	end

end

local function onJumpRequest()
	if canJumpAgain and numJumps < MAX_JUMPS then
		humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
	end
end

humanoid.StateChanged:Connect(StateChanged)
UserInputService.JumpRequest:Connect(onJumpRequest)

  1. I want my StarterPlayer Double Jump, Triple Jump, Etc.

  2. I have got a index nil with my variable ‘StateChanged’

  3. I’ve tried to change the variable name to “OnStateChanged”, but still have received the same error.

Please Let me know,

Thanks.

2

It’s because you forgot an equal sign here.

3 
local UserInputService = game:GetService("UserInputService")
local player = game:GetService("Players").LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")

local MAX_JUMPS = 2
local TIME_BETWEEN_JUMPS = 0.2
local numJumps = 0
local canJumpAgain = false

local function StateChanged(oldState, newState)
	if Enum.HumanoidStateType.Landed == newState then
		numJumps = 0
		canJumpAgain = false
	elseif Enum.HumanoidStateType.Freefall == newState then
		wait(TIME_BETWEEN_JUMPS)
		canJumpAgain = true
	elseif Enum.HumanoidStateType.Jumping == newState then
		canJumpAgain = false
		numJumps += 1
	end
end

local function onJumpRequest()
	if canJumpAgain and numJumps < MAX_JUMPS then
		humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
	end
end

humanoid.StateChanged:Connect(StateChanged)
UserInputService.JumpRequest:Connect(onJumpRequest)