Machine Problem

Write a program that uses a controller that will ask the user to give four numbers and then the program will compute the total sum of the four numbers, and display the results on the screen.

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Program Listing
<!-- index.htm
  Author   : Prof. Jake Rodriguez Pomperada, MAED-IT, MIT
  Date     : August 11, 2021  11:56 AM Wednesday
  Place    : Bacolod City, Negros Occidental
  Websites : www.jakerpomperada.com and www.jakerpomperada.blogspot.com
  Email    : jakerpomperada@gmail.com
 -->
<html>

  <head>
      <title>Addition of Four Numbers Using Controllers in AngularJS</title>
     <script type="text/javascript" src="angular.min.js"></script>
      <script>
        var myApp=angular.module("myModule",[]);
        myApp.controller("Sum_Values",function($scope) {
          $scope.Sum_All=function()
          {
          let sum = 0;


          $scope.sum = ($scope.a + $scope.b + $scope.c + $scope.d);

          $scope.sum = "The total sum is " + $scope.sum + ".";
         
      }

      $scope.Clear_All=function()
          {
          $scope.a = "";
          $scope.b = "";
          $scope.c = "";
          $scope.d = "";
          $scope.sum = "";
      }
    
    
     });
     </script>
 </head>
 <style>
body {
  font-family: arial;
  font-size: 25px;
  font-weight: bold;
}
</style>
 <body ng-app="myModule" ng-controller="Sum_Values">
   <h3>Addition of Four Numbers Using Controllers in AngularJS
   </h3>
 <div>
  <table border="0">
     <tr>
      <td>
      Enter Your First Number
     </td>
       <td>
         <input type="number" ng-model="a"/>
       </td>
      <tr>
      <td>
      Enter Your Second Number
     </td>
       <td>
         <input type="number" ng-model="b"/>
       </td>   
       </tr>
       <tr>
      <td>
      Enter Your Third Number
     </td>
       <td>
         <input type="number" ng-model="c"/>
       </td>   
       </tr>
        <tr>
      <td>
      Enter Your Fourth Number
     </td>
       <td>
         <input type="number" ng-model="d"/>
       </td>   
       </tr>
      <tr>
         <td colspan="10">
           <br>
           <input type="button" ng-click="Sum_All();"
           value="Addition"/>
           <input type="button" ng-click="Clear_All();"
           value="Clear"/>
         </td>
      </tr>
      </table>
     </div><br>
       {{sum}}
    </div>
  </body>
</html>

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