How to change walkspeed through a text box?

Hi! Scripting Helpers is not a request site, but I'm feeling extra generous today.

Here's what you'll need:

https://developer.roblox.com/en-us/api-reference/function/RemoteEvent/FireServer

First off, we need a text box. Make a ScreenGui and in it, make a TextBox. Keep the name TextBox.

Now, create a RemoteEvent. Put it in ReplicatedStorage.

Ok, in the TextBox make a LocalScript.

We'll start off by detecting when the text changes.

script.Parent:GetPropertyChangedSignal("Text"):Connect(function()
	
end)

All done? Now, we need to fire the remote event.

script.Parent:GetPropertyChangedSignal("Text"):Connect(function()
	game:GetService("ReplicatedStorage").RemoteEvent:FireServer(script.Parent.Text) -- Fire the RemoteEvent and pass the Text params
end)

Time to move to the server. Make a server script and put it anywhere.

Let's make the code.

local RE = game:GetService("ReplicatedStorage").RemoteEvent
function RE.OnServerInvoke(plr, args)
	
end

Now we need to change the walkspeed.

local RE = game:GetService("ReplicatedStorage").RemoteEvent
function RE.OnServerInvoke(plr, args) -- The first param of any OnServerInvoke is always the player
	local hum = plr.Character.Humanoid
	if tonumber(args) then -- Check to see if args is a number
		hum.WalkSpeed = args -- Change the walkspeed
	end
end

Hope this helped!