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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>First Steps Into PHP</title>
- </head>
- <body>
- <form>
- N: <input type="text" name="num" />
- <input type="submit" />
- </form>
- <!--Write your PHP Script here-->
- <?php
- if (isset($_GET['num'])){
- $n = intval($_GET['num']);
- $factorial = 1;
- for ($i = 1; $i <= $n; $i++){
- $factorial *= $i;
- }
- echo $factorial;
- }
- ?>
- </body>
- </html>
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