For Factorial Numbers First we have to create a html Page for entering the number
(factorial.html)
<html>
<body bgcolor="orange">
<h1 style="color:white"> Factorial Number</h1>
<form method="POST" action="fact.php">
<p style="font-family:comic sans ms;color:white;font-size:40px">Enter Number:<input type="number" name="n1" >
<br>
<input type="submit" value="enter">
</form>
</body>
</html>
Next We Have to embed Php File into form Tag
<?php
$a=$_POST["n1"];
echo "$a","<br>";
$fact=1;
for($i=1;$i<=$a;$i++) {
$fact=$fact*$i;
}
echo "Factorial is: $fact";
?>
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