put this code in  html file above the form 

@if (count($errors) > 0)

         <div class = "alert alert-danger">

            <ul>

               @foreach ($errors->all() as $error)

                  <li>{{ $error }}</li>

               @endforeach

            </ul>

         </div>

      @endif






put this code in controller

 public function studentinsert(Request $request)

    {

      $this->validate($request,[

         'name'=>'required|max:30|unique:student',

         'price'=>'required',

      ]);


        $student = new Studentview();


        $student->name = $request->name;

        $student->price= $request->price;


        $student->save();

        return redirect()->route('admin.show')->with('status','data insert successful');



    }


example of html page 

<!DOCTYPE html>

<html>

<head>

<title></title>


<meta charset="utf-8">

  <meta name="viewport" content="width=device-width, initial-scale=1">

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>

</head>

<body>



<h1 style="text-align:center; ">Add New Student</h1>

<div class="container-fluid" style="margin-left: 150px; margin-right: 50px;">



@if (count($errors) > 0)

         <div class = "alert alert-danger">

            <ul>

               @foreach ($errors->all() as $error)

                  <li>{{ $error }}</li>

               @endforeach

            </ul>

         </div>

      @endif

<form method="post" action="{{route('admin.save')}}">

{{@csrf_field()}}

  <div class="form-group"  class="col-xs-4">

    <label for="exampleInputEmail1">Enter the name </label>

    <input type="text"  name="name" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp" style="" value="{{old('student_name')}}">

  

    <small id="emailHelp" class="form-text text-muted">We'll never share your Name with anyone else.</small>


  </div>

  <div class="form-group">

    <label for="exampleInputPassword1">enter the price</label>

    <input type="number" class="form-control" id="exampleInputPassword1" name="price" value="{{old('price')}}">

     

  </div>

  <!-- <div class="form-group form-check">

    <input type="checkbox" class="form-check-input" id="exampleCheck1">

    <label class="form-check-label" for="exampleCheck1">Check me out</label>

  </div> -->

  <button type="submit" class="btn btn-primary">Submit</button>

</form>

</div>

</body>

</html>

example of  controler page

public function studentinsert(Request $request)
    {
      $this->validate($request,[
         'name'=>'required|max:30|unique:student',
         'price'=>'required',
      ]);

        $student = new Studentview();

        $student->name = $request->name;
        $student->price= $request->price;

        $student->save();
        return redirect()->route('admin.show')->with('status','data insert successful');


    }