Machine Problem

Write a program that will ask the user to give a string or a series of numbers and then the program will check if the given string or series of numbers is a palindrome or not a palindrome.

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Program Listing

<!-- index.htm
  Author   : Prof. Jake Rodriguez Pomperada, MAED-IT, MIT
  Date     : July 21, 2021  Wednesday  9:54 PM
  Place    : Bacolod City, Negros Occidental
  Websites : www.jakerpomperada.com and www.jakerpomperada.blogspot.com
  Email    : jakerpomperada@gmail.com
 -->
<html ng-app="mainApp">
<head>
	<title>Palindrome 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>

<script type="text/javascript">

// AngularJS Controller Declaration
angular.module('mainApp', []).service('myService', function() {
  this.myFunc = function(val_1) {
   // find the length of a string
    const len = val_1.length; 

   str_upper = val_1.toUpperCase();
    
    // loop through half of the string
    for (let i = 0; i < len / 2; i++) {

        // check if first and last string are same
        if (str_upper[i] !== str_upper[len - 1 - i]) {
            return 'is not a Palindrome.';
        }
    }
    return 'is a Palindrome.';
  };
}).controller('Palindrome_Controller', function($scope, myService) {
  $scope.check = function(val_1) {
    $scope.myUserService = myService.myFunc(val_1);
  }

});
</script>

<div ng-app="mainApp" ng-controller="Palindrome_Controller">
	<form>
	<table border="0" cellspacing=10>
	<tr>Palindrome in AngularJS</tr>
	<tr>
  	<td>Enter a String</td>
	<td><input type="text" ng-model="val_1" ng-init="val_1=''" ng-keyup="check(val_1)"/></td>
	</tr>
	<table>
	</form>
	 <b>The given {{val_1 | uppercase }} {{myUserService}}</b>
</div>
</body>
</html>

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