How do I get the contents of all text entered in a textbox

[supreme_comrade (dino)]

In the white box is the textbox, everytime a number is inside the textbox and the player presses enter. I want the number they inputted in the textbox to be displayed in the textlabel, “Previous Guesses:”.

So that part is mostly easy to create, as a matter of fact I have done it. But the problem is when I type in another guess in the textbox and press enter. It replaces my previous guess

[gertkeno (Gert)]

Can you post the script you are working with? Are you using an array to store previous guesses?

[supreme_comrade (dino)]

TextBox.FocusLost:Connect(function(Enter)	
	if Enter == true then -- Checks if EnterKey Is Pressed.
		print("Pressed Enter!")
		
		local TestText = TextBox.Text
		script.Parent.Parent.Parent.Last.Numbers.Text = TestText .. "; "
		
		local Number = tonumber(TextBox.Text)
		if Number then -- checks if the textbox has only numbers if not it will not continue.
			if Number == RandomNum then
				script.Parent.Parent.Answer.ImageTransparency = 0
				script.Parent.Parent.Answer.Image = "rbxassetid://12856690383"
				wait(1.85)
				script.Parent.Parent.Answer.ImageTransparency = 1
				
			else
				script.Parent.Parent.Answer.ImageTransparency = 0
				script.Parent.Parent.Answer.Image = "rbxassetid://12856695110"
				wait(1.85)
				script.Parent.Parent.Answer.ImageTransparency = 1
			end
		end
	end
end)

[gertkeno (Gert)]

If Last.Numbers.Text is the previous guesses then you want to concatenate TestText with itself like so

script.Parent.Parent.Parent.Last.Numbers.Text ..= TestText .. "; "

..= will concatenate the string onto itself like += will add a number into a variable.