Machine Problem

Write a program that uses ng-model directive that will accept a number and then the program will check if the given number is a positive or negative number, display the results on the screen.

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Program Lisiting
<!-- index.htm
  Author   : Prof. Jake Rodriguez Pomperada, MAED-IT, MIT
  Date     : July 28, 2021  Tuesday   1:32 PM
  Place    : Bacolod City, Negros Occidental
  Websites : www.jakerpomperada.com and www.jakerpomperada.blogspot.com
  Email    : jakerpomperada@gmail.com
 -->
<html>
<head>
  <title>Positive and Negative Number Using ng-model in AngularJS</title>
</head>
<style>
body {
  font-family: arial;
  font-size: 25px;
  font-weight: bold;
}
</style>
<script type="text/javascript" src="angular.min.js">
</script><br>
<script>
 var app =  angular.module('app', []);

  app.filter('Positive_Negative', function() {
    return function(number) {
    if (typeof number === "undefined") {
      number = 1;
    } else   if (number >=0){
      message = "The given number " + number + " is Positive Number";
     } else
     {
      message = "The given number " + number + " is Negative Number";
     }
     return(message);
    };
});
    
  </script>


<div ng-app="app" ng-init="Val_Num=0">
  <form>
  <table border="0" cellspacing=10>
  <tr>Positive and Negative Number Using ng-model in AngularJS</tr>
  <tr>
  <td>Enter a Number</td>
  <td><input type="number"  ng-model="Val_Num"
    ng-init="Val_Num=0" required></td>
  </tr>
</table>
  </form>
  <p>
   {{Val_Num | Positive_Negative}}.</p><br>
</div>
</body>
</html>

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