HTML table <table> tag usage and attributes

As one of the commonly used tags, the form is very useful, and the unexpected things that you can see everywhere may be done by the form.

Tags:
<table> :define table, put it on the outer layer, wrap <tr><td>...;
<tr>(table row):define table row;
<td>(table data):define table cell;
<th>(table head):define table header;

Basic example
code:

<table>
    <tr>
        <td>(1,1)</td>
        <td>(1,2)</td>
    </tr>
    <tr>
        <td>(2,1)</td>
        <td>(2,2)</td>
    </tr>
</table>

display:

(1,1)	(1,2)
(2,1)	(2,2)

Code:

<table>
    <tr>
        <th>title1</th>
        <th>title2</th>
    </tr>
    <tr>
        <td>(2,1)</td>
        <td>(2,2)</td>
    </tr>
    <tr>
        <td>(3,1)</td>
        <td>(3,2)</td>
    </tr>
</table>

display:

title1	title2
(2,1)	(2,2)
(3,1)	(3,2)

Table common attributes:

width	Set table width
height	Set table height
border	Set the border width of the table
align	Set the horizontal alignment of the table on the web page
bgcolor	Set the overall background color of the table

Common attributes of td/th:

width	Set the width of the cell
height	Set the height of the cell
align	Set the horizontal alignment of the content in the cell
valign	Set the vertical alignment of the content in the cell
rowspan	Set the number of cells to be merged across rows (vertical)
colspan	Set the number of cells to be merged across columns (horizontal)

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