A simple problem

mrdellano

Hello, I am learning PHP and I have 0 experience with programming. Please forgive me if this is a stupid question. So I have the following code:

<?php

// set variables from form input
$upperLimit = $_POST['limit'];
$lowerLimit = 1;
// keep printing squares until lower limit = upper limit
do 	{
	 echo '<tr><td>'.($lowerLimit * $lowerLimit).'</td></tr>';
	$lowerLimit++;
	}
while($lowerLimit <= $upperLimit);
// print end marker
echo '<br />END';

?>

The ouput is a table, and each number is showing up on a different row.

How can I get the table to have 2 columns, and then have the numbers populate the 2 columns and however many number of rows.

I do not want the same numbers on two different columns. I want the result of $lowerLimit * $lowerLimit to fill in the table with no repeated number.

I am not sure if I need to use an if/then statement, or the for() loop.

If someone could explain how to achieve this seemingly simple task, I would be much obliged!

mrdellano

This is where I am at so far:

<table width="100%" border="1">
<?php

// set variables from input
$upperLimit = $_POST['limit'];
$lowerLimit = 1;
while  ($lowerLimit <= $upperLimit) 
	{
	// as long as $r and $lowerLimit are increased at the same rate, this should work
	echo '<tr>';
	for ($c = 1; $c <= 2; $c++) 
		{
			echo '<td>'.$lowerLimit * $lowerLimit.'</td>';
			$lowerLimit++;
		}
	echo '</tr>';
	break;
	}
// this may need to be moved

?>

</table>

I have the two columns like I wanted, but it will not continue on to row 2, etc. (The $upperLimit is 5.)

Am I on the right track????

mrdellano

Well, I just took out the "break;" (and the useless comments) out, and it seemed to work, but I have a 6th value that I did not request. Why is that 6th request there when the $upperLimit is 5 ???

<?php

$upperLimit = $_POST['limit'];
$lowerLimit = 1;
while  ($lowerLimit <= $upperLimit) 
	{
	echo '<tr>';
	for ($c = 1; $c <= 2; $c++) 
		{
			echo '<td>'.$lowerLimit * $lowerLimit.'</td>';
			$lowerLimit++;
		}
	echo '</tr>';
	}

?>

mrdellano

Sorry for all the posts. I have come up with a solution, but it seems overly complicated. Is there a more simple way to do the following:

<?php

$upperLimit = $_POST['limit'];
$lowerLimit = 1;
while ($lowerLimit <= $upperLimit) 
	{	
	echo '<tr>';
	for ($c = 1; $c <= 2; $c++) 
		{
		if ($lowerLimit <= $upperLimit) 
			{
			echo '<td>'.$lowerLimit * $lowerLimit.'</td>';
			$lowerLimit++;
			}
		else 
			{
			echo '<td>&nbsp;</td>';
			}
		}
	echo '</tr>';
	}
?>

$upperLimit = 5