Problem Description #

I wrote this Roblox Lua script to handle rebirth functionality, but I'm getting an error attempt to compare string and number on line 2. Here's my code:

script.Parent.Yes.MouseButton1Click:connect(function() 
    if game.Players.LocalPlayer.leaderstats.Stage.Value < 20 and db then 
        db = false 
        script.Parent.Question.Text = "YOU NEED ATLEAST 20 STAGES TO REBIRTH!" 
        wait(3) 
        script.Parent.Visible = false 
        open = false 
        db = true 
    elseif db then 
        game.ReplicatedStorage.Rebirth:FireServer() 
        script.Parent.Visible = false 
        open = false 
    end 
end)

Answer #

Hey there, let's break down this error for you clearly.

The attempt to compare string and number error pops up on line 2 because you're trying to compare game.Players.LocalPlayer.leaderstats.Stage.Value (which is a string data type) with the number 20 using the < operator. Lua doesn't let you directly compare different data types—you can't check if a text string is "less than" a number.

Root Cause #

The most common reason this happens is that your Stage value in the leaderstats folder was created as a StringValue instead of a numeric value type (like IntValue or NumberValue). Since stages track numerical progression, they should always use a numeric value type to store their data.

Fixes #

1. Correct the Value Type in Roblox Studio

   • Enter play mode and find the leaderstats folder under your test player instance.
   • Delete the existing Stage StringValue.
   • Create a new IntValue (perfect for whole-number stage counts) and name it Stage.
   • Make sure any server-side code that sets or updates the Stage value uses this numeric type instead of a string.

2. Add a Safety Check in Your Script (Optional)
   To guard against accidental type mismatches later, you can convert Stage.Value to a number before comparing it. This acts as a fallback if the value ever gets messed up:

   script.Parent.Yes.MouseButton1Click:connect(function() 
       local stageNum = tonumber(game.Players.LocalPlayer.leaderstats.Stage.Value) or 0
       if stageNum < 20 and db then 
           db = false 
           script.Parent.Question.Text = "YOU NEED ATLEAST 20 STAGES TO REBIRTH!" 
           wait(3) 
           script.Parent.Visible = false 
           open = false 
           db = true 
       elseif db then 
           game.ReplicatedStorage.Rebirth:FireServer() 
           script.Parent.Visible = false 
           open = false 
       end 
   end)
   

   The tonumber() function turns a string that represents a number into an actual number, and or 0 ensures you get a valid number (0) if the conversion fails (like if the value is a non-numeric string).

That should fix the error and get your rebirth system working as intended!

内容的提问来源于stack exchange，提问作者Anthony K.