Hi this is a table converting celsius to kelvin and fahrenheit, I am just wondering why my code does not loop :( it only displays the first two lines and stops. Thank you!

```
<?php 
$celsius = 100;
$stop_kelvin = 0;

print '<table>';
print '<tr><th>Degrees Celsius(C)</th><th>Kelvin(K)</th><th>Degrees Fahrenheit(F)</th></tr>';
while ($kelvin <= $stop_kelvin) {
$fahr = ($celsius*1.8) + 32;
$kelvin = $celsius + 273;
print"<tr><td>$celsius</td><td>$kelvin</td><td>$fahr</td></tr>";
$fahr += 1;
}
print '</table>';

?>

```