Code: <form action="" method="post"> Enter Number : <input type="text" name="num" /> <input type="submit" name="submit" value="Submit" /> </form> <?php if(isset($_POST['submit'])){ $num = $_POST['num']; $fact = 1; for($i=2;$i>=1;$i--){ $fact *= $i; } print "The Factorial is: ".$fact; } ?>
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