????????

?? form004.php

<html>
<head>
<title>8.3????????</title>
</head>

<body>
<h1>???????</h1>
<h3>form004.php</h3>

?????????????????<br>

<?php
$no = $_GET['suu'];
$kotae = 0;
for($i=0;$i <= $no;$i++){
$kotae += $i;
}
echo $no . "??????<b>" . $kotae . "</b>??";
?>

<br /><br />
<form action="form004.php" method="get">
???????????<br />
<input type="text" name="suu" />
<input type="submit" value="??" />
</form>

</body>
</html>