The rowspan and colspan are <td> tag attributes. These are used to specify the number of rows or columns a cell should span. The rowspan attribute is for rows as well as the colspan attribute is for columns.
These attributes have numeric values, for example, colspan=3 will span three columns.
You can try to run the following code to work with the rowspan and colspan attribute in HTML
Example
<html>
<head>
<style>
table, th, td {
border: 1px solid black;
width: 100px;
height: 50px;
}
</style>
</head>
<body>
<h1>Heading</h1>
<table>
<tr>
<th colspan="2"></th>
<th></th>
</tr>
<tr>
<td></td>
<td></td>
<td rowspan="3"></td>
</tr>
<tr>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
</tr>
</table>
</body>
</html>Output
