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<html>

 
<body>

 
<form action="<?php echo $_SERVER['PHP_SELF']?>" method=POST>

<input type name=txtnumber placeholder="Enter a number ">

<input type=submit   name="submit">

</form>


?php


if (isset($_POST['submit']))

{

	error_reporting(0);

              function fact($n)

              {

                          if($n==1)

                          {

                                  return 1;

                                      }

              
                			  else 

							  {  

							   return($n*fact($n-1));

                                                             
                               }

              }

              function singleval($n)

              {

                          while($n>9)

                          {

							  $sum=0;

                                      while($n)     
                                                   
                                      {

                 $r=$n%10;

                                                  $sum=$sum+$r;

     $n=$n/10;

                                      }         
 
                    $n=$sum;  
                             
                          }

                          return $n;   
                 
              }

              echo fact($_POST['txtnumber']);

              echo "
";

              echo singleval($_POST['txtnumber']);

}

?>

</body>

</html>

12)Write a PHP script for the following: Design a form to accept a number from the user. Perform the operations and show the results. Factorial of a number using Recursion. Add the digits of that number to reduce it to single digit. (use the concept of self processing page.)

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12)Write a PHP script for the following: Design a form to accept a number from the user. Perform the operations and show the results.
Factorial of a number using Recursion.
Add the digits of that number to reduce it to single digit.
(use the concept of self processing page.)