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<html>
<head>
<title>SIMPLE CALCULATOR</title>
</head>
<body>
<form method="post">
<table>
<caption><h2> SIMPLE CALCULATOR </h2></caption>
<tr>
<td>First Number:</td>
<td><input type="text" name="numl" /></td>
</tr>
<tr>
<td>Second Number:</td><td><input type="text" name="num2"/></td>
</tr>
<tr>
<th colspan="2"><input type="submit" name="submit" value="calculate"></th>
</tr>
</table>
</form>
<?php
if(isset($_POST['submit']
{
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
if(is_numeric($num1) and is_numeric($num2))
{
echo "Addition:".($num1+$num2)."<br>";
echo "Subtraction:".($num1-$num2)."<br>";
echo "Multiplication:".($num1*$num2)."<br>";
echo "Division: ".($num1/$num2);
}
else
{
echo"<script type='text/javascript'> alert(' ENTER VALID NUMBER');</script>";
?>
</body>
</html><html>
<head>
<title>SIMPLE CALCULATOR</title>
</head>
<body>
<form method="post">
<table>
<caption><h2> SIMPLE CALCULATOR </h2></caption>
<tr>
<td>First Number:</td>
<td><input type="text" name="numl" /></td>
</tr>
<tr>
<td>Second Number:</td><td><input type="text" name="num2"/></td>
</tr>
<tr>
<th colspan="2"><input type="submit" name="submit" value="calculate"></th>
</tr>
</table>
</form>
<?php
if(isset($_POST['submit']
{
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
if(is_numeric($num1) and is_numeric($num2))
{
echo "Addition:".($num1+$num2)."<br>";
echo "Subtraction:".($num1-$num2)."<br>";
echo "Multiplication:".($num1*$num2)."<br>";
echo "Division: ".($num1/$num2);
}
else
{
echo"<script type='text/javascript'> alert(' ENTER VALID NUMBER');</script>";
?>
</body>
</html>
}
}
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