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Editorial Team
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Asked: 2026-06-02T12:38:56+00:00

Im studying for finals and i came across this question: write a PHP script

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Im studying for finals and i came across this question:

write a PHP script which reads a positive integer
and displays the sum, the number, sum N*N and N!
for example n=6 will display sum= 1,3,6,10,15,21
and N*N = 1,4,9,16,25,36
N!=1,2,6,24,120,720.

i have managed to do the number that’s it, i have researched, you can use the inbuilt factorial and sum method, i have tried but i get empty pages when i output it.

here is my code so far:

<html>
   <body>
      <form action="values.php" method="post" >
         num:<input type="text" name="num" size ="5"/>
         <input type = "submit" value = "Submit number" />

      <table border = "2">
        <th> Number </th>
        <th> Sum </th>
        <th> N*N </th>
        <th> N! </th>

        </tr>
     <?php
        $num=$_POST["num"];
        if ($num==0)
            $num="";
        else
        {
           $sum=0;
           for($i=0; $i<=$num; $i++){
           $sum=$sum+$i;
        }
     }


          for ($number = 1; $number <=6; $number++)
          {
            $total=0;
            $num=(int)$_POST['num'];
            $total=$total+$num;

               $root = sqrt($number);
               $sum =($number*$total);
               $ntn =($number*($total*$total));
               $fact =($number-1);

               print("
               <tr align = 'center'>
               <td> $number </td>
               <td> $sum </td>
               <td>$ntn </td>
               <td>$fact</td>
               </tr>\n");
          }
    ?>
</table>


</body>

Any help would be appreciated.

Thanks in advance!

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1 Answer

  1. Editorial Team

    Working code:

    You don’t seem to have understood the question. The “sum” column was to have “sum of all numbers up to i”, where i ranged from 0 to $num.

    N*N was to hold “squares of i”, and the last one held “factorial of i”.

    <html>
   <body>
      <form action="values.php" method="post" >
         num:<input type="text" name="num" size ="5"/>
         <input type = "submit" value = "Submit number" />

      <table border = "2">
        <th> Number </th>
        <th> Sum </th>
        <th> N*N </th>
        <th> N! </th>

        </tr>
     <?php
        $num=$_POST["num"];
        if ($num==0){
            $num="";
     }

$sum=0;
$fact=1;
          for ($number = 1; $number <=$num; $number++)
          {

           $sum=$sum+$number;
               $ntn =$number*$number;
               $fact =$number*$fact;

               print("
               <tr align = 'center'>
               <td> $number </td>
               <td> $sum </td>
               <td>$ntn </td>
               <td>$fact</td>
               </tr>\n");
          }
    ?>
</table>


</body>
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