Factorial <center> <form action = "" method="post"> <h2>Factorial Number</h2> <table> <tr><td><input type="number" name="aa" /></td></tr> <tr><td><input type="submit" name="save" value="Submit" /></td></tr> </table> </form> </center> <?php $x=$_POST['save']; $y=$_POST['aa']; function getFactorial($y){ $fact=1; for($i=1;$i<=$y;$i++) $fact *=$i; return $fact; } if(isset($x)and($y)) { echo 'Factorial of Number : <strong>'. getFactorial($y).'</strong>'; } ?> Fibinicci <?php $a=0; $b=1; for($i=0;$i<=10;$i++){ if($i==0){ $c=0; }else{ $c=$a+$b; $a=$b; $b=$c; } echo $c." ";