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To resolve the issue of an unassigned variable in Blade while transferring a variable from Laravel 10 controller, you can ensure that the variable is properly defined and passed to the blade using the following steps:

1. In the controller, define the variable and assign it a value.

2. Pass the variable to the view by adding it to the second argument of the view() function, like so:

   public function index()
   {
       $variable = "Hello World";
   
       return view('myView', ['variable' => $variable]);
   }
   

3. In the Blade view, you can then access the variable using the {{$variable}} syntax:

   <h1>{{$variable}}</h1>
   

This will ensure that the variable is properly assigned and can be accessed in the view without any errors.