Problem wiht togglable crouch

[Byfron_90]

1. What do you want to achieve? Keep it simple and clear!
   I want soo when the player press LeftControl the player crouches

2. What is the issue? Include screenshots / videos if possible!
   It works just the first time, soo when i press LeftControl it crouches but when i press LeftControl again it doesnt get up and i stay crouched until i reset

3. What solutions have you tried so far? Did you look for solutions on the Creator Hub?
   I honestly dont know what to do since i dont find nothing wrong in my script, also i dont get any error in the output

This is the code wich is a local script in StarterCharacterScripts

local UserInputService = game:GetService("UserInputService")
local plrs = game:GetService("Players")
local db = false
local crouch = false

local function onInputBegan(input, gameProcessed)
	if gameProcessed then return end
	if input.KeyCode == Enum.KeyCode.LeftControl then
		if not db then
			db = true
			local player = plrs:GetPlayerFromCharacter(script.Parent)
			local character = player.Character or player.CharacterAdded:Wait()
			local humanoid = character:FindFirstChildOfClass("Humanoid")

			if not crouch then
				crouch = true
				if humanoid then
					humanoid.HipHeight = -1.5
					humanoid.WalkSpeed = 6
				end
			end
			if crouch then
				crouch = false
				if humanoid then
					humanoid.HipHeight = 0
					humanoid.WalkSpeed = 16
				end
			end
			task.wait(2)
			db = false
		end
	end
end

UserInputService.InputBegan:Connect(onInputBegan)

[pingurti (eitorreal)]

this should work for you, but i would recommend just making a crouch animation as changing hipheight is a bit janky

local UserInputService = game:GetService("UserInputService")
local Players = game:GetService("Players")

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

local db = false
local crouch = false


local function onInputBegan(input, gameProcessed)
	if gameProcessed then return end
	if input.KeyCode == Enum.KeyCode.LeftControl then
		if not db then
			db = true

			if not crouch then
				crouch = true
				print("crouching")
				humanoid.HipHeight = -1.5
				humanoid.WalkSpeed = 6
			else
				crouch = false
				print("not crouching")
				humanoid.HipHeight = 0
				humanoid.WalkSpeed = 16
			end

			task.wait(2)
			db = false
		end
	end
end

UserInputService.InputBegan:Connect(onInputBegan)

[pingurti (eitorreal)]

@Byfron_90

if not crouch then
				crouch = true
				if humanoid then
					humanoid.HipHeight = -1.5
					humanoid.WalkSpeed = 6
				end
			end
			if crouch then
				crouch = false
				if humanoid then
					humanoid.HipHeight = 0
					humanoid.WalkSpeed = 16
				end
			end

Also, this was the problem, you were changing it to true then immediately checking it and toggling again, in a different if statement. You would need to use else or elseif instead.

[2112Jay]

Best I could get this to work.

local UserInputService = game:GetService("UserInputService")
local plrs = game:GetService("Players")
local player = plrs.LocalPlayer
local db = false
local crouch = false
local defaultHipHeight = 2

local function onInputBegan(input, gameProcessed)
	if gameProcessed then return end
	if input.KeyCode == Enum.KeyCode.LeftControl then
		if not db then db = true
			local character = player.Character or player.CharacterAdded:Wait()
			local humanoid = character:FindFirstChildOfClass("Humanoid")
			if humanoid then
				if not crouch then
					crouch = true
					humanoid.HipHeight = 1
					humanoid.WalkSpeed = 6
				else	crouch = false
					humanoid.HipHeight = defaultHipHeight
					humanoid.WalkSpeed = 16
				end
			end	task.wait(1)
			db = false
		end
	end
end

UserInputService.InputBegan:Connect(onInputBegan)

Tested and tried to stick with your logic.. gl.