align="center" doesn't center content in table

Hello,

I would like to center 'Books' but align=center seems dont work on it.
Any idea?

The following is the code which i tried.
<table border="1">
<tr>
<th align="center" >Books</th>
</tr>
<tr>
<td>HTML</td>
<td>$590</td>
</tr>
</table>

Thanks

You have one column for the first row and two columns for the second. Change it to:

<table border="1">
<tr>
<th align="center" colspan = “2”>Books</th>
</tr>
<tr>
<td>HTML</td>
<td>$590</td>
</tr>
</table>

Hope it works for you.