Fahrenheit and Celsius table by for loop
print '<table>'; print '<tr><th>Fahrenheit</th><th>Celsius</th></tr>'; for ($fahr = -50; $fahr <= 50; $fahr += 5) { $celsius = ($fahr - 32) * 5 / 9; print "<tr><td>$fahr</td><td>$celsius</td></tr>"; } print '</table>';