How do I temporarily stop a script from running?

I am new to Roblox scripting, and I want to temporarily stop a script from running when I press a key.

Code:

uif = game:GetService("UserInputService")


uif.InputBegan:connect(function(imput)
	if imput.KeyCode == Enum.KeyCode.LeftShift then
		
		local plr = game.Players.LocalPlayer
		local char = script.Parent.Humanoid
		char.WalkSpeed = 21
	
	end
end)

uif.InputEnded:connect(function(imput)
	if imput.KeyCode == Enum.KeyCode.LeftShift then
		local plr = game.Players.LocalPlayer
		local char = script.Parent.Humanoid
		char.WalkSpeed = 16
	end
end)

This script works as a shift run code, and I want to stop this code from running when I press the key, 'c'.

I tried this way from stopping it:

uif.InputEnded:connect(function(imput)
	if imput.KeyCode == Enum.KeyCode.C then
		Script.Disabled = true
	end
end)

However, the problem is that when I don't press c, the script doesn't work and it stops functioning completely. I tried to put a 'Script.Disabled = false' at the beginning of script, but that doesn't work as well.

Can someone please tell me how I fix this problem so that when I press c, the shift run script doesn't function.

Thank you, this issue has been bugging me for quite a while.

I spotted something wrong:

uif.InputEnded:connect(function(imput)
    if imput.KeyCode == Enum.KeyCode.C then
        Script.Disabled = true -- I spotted that "Script" should have a lower case s: "script"
    end
end)

This may just be a typo and not the problem but if this worked for you please accept this as your answer.

All the best,

PrismaticFruits - obviously a very talented scripter

Try replacing that script with this, also be sure to rename that script to "SprintingMechanism" or else it won't work.

local uis = game:GetService("UserInputService")

uis.InputBegan:connect(function(input)
	if input.KeyCode == Enum.KeyCode.LeftShift then
		local plr = game.Players.LocalPlayer
		local char = script.Parent.Humanoid
		char.Walkspeed = 21
	end
end)

uis.InputEnded:connect(function(input)
	if input.KeyCode == Enum.KeyCode.LeftShift then
		local plr = game.Players.LocalPlayer
		local char = script.Parent.Humanoid
		char.Walkspeed = 16
	end
end)

-- Edited Part
local replicatedstorage = game:GetService("ReplicatedStorage")
local sprinttoggle = Instance.new("BoolValue", replicatedstorage)
sprinttoggle.Name = "sprinttoggle"
sprinttoggle.Value = true


uis.InputEnded:connect(function(input)
	if input.KeyCode == Enum.KeyCode.C then
		if sprinttoggle.Value == true then
			sprinttoggle.Value = false
			script.Disabled = true
		end
	end
end)

After that, insert a script into serverscriptservice named "SprintingServerFire". If you know what you are doing, you can adjust it accordinlgly and it should work.