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<table>
  <tr>
    <th>Name</th>
    <th>Month</th>
    <th>Salary</th>
  </tr>
  <tr>
    <td>Ramzan</td>
    <td>September</td>
    <td>$100</td>
  </tr>
  <tr>
    <td>Ramzan</td>
    <td>October</td>
    <td>$200</td>
  </tr>
  <tr>
    <td>Ramzan</td>
    <td>November</td>
    <td>$300</td>
  </tr>
  <tr>
    <td colspan="3">Sum: $600</td>
  </tr>
</table>

table, th, td {
  border: 1px solid green;
  border-collapse: collapse;
}
table {
  width: 100%;
}

HTML Table Colspan to Merge Columns

HTML tables are useful for displaying information in an organized format, such as product details, schedules, comparison charts, and reports. Sometimes, you may want one cell to occupy the space of multiple columns. This is where the HTML colspan attribute becomes helpful.

The colspan attribute allows you to merge two or more adjacent columns into a single table cell. It is commonly used to create table headings, group related information, or display a title across the entire width of a table.

For example, imagine you are creating a student marks table with separate columns for subjects and scores. You can use colspan to create a single heading that stretches across several columns, making the table easier to understand.

To use this feature correctly, place the colspan attribute inside a table header cell or a regular table cell. The number you specify determines how many columns the cell should span. For example, a value of three means the cell occupies the space of three columns.

It is important to remember that colspan merges cells horizontally, not vertically. If you want a cell to extend across multiple rows, HTML provides another attribute called rowspan.

When designing tables, keep the structure consistent and make sure the remaining cells are arranged correctly. Incorrect column counts can cause the table to look uneven or display information in unexpected positions. You can also use CSS to improve the table’s appearance with borders, spacing, background colors, and responsive layouts.

The colspan attribute is particularly useful when creating report headings, category labels, price summaries, and other layouts where related information belongs under a shared heading. However, avoid merging too many cells when it makes the table difficult to read, especially on mobile devices.

In conclusion, HTML table colspan is a simple but valuable feature for creating flexible and well-organized tables. By understanding how it works and using it appropriately, beginners can improve their table layouts and present information more clearly. Learning colspan alongside other basic HTML table attributes will help you build more effective and professional web pages.

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