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Table cell

Summary

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A table cell is one grouping within a chart table used for storing information or data. Cells are grouped horizontally (rows of cells) and vertically (columns of cells). Each cell contains information relating to the combination of the row and column headings it is collinear with. In software design, table cells are a key component in HTML and webpage building, and it is part of the <table> component. A coder may specify dimensions for a table cell, and use them to hold sections of webpages.

HTML usage edit

Kinds of cell in HTML edit

A table cell in HTML is a non-empty element and should always be closed. There are two different kinds of table cell in HTML: normal table cell and header cell. <td> denotes a table cell, the name implying 'data', while <th> denotes a table 'header'. The two can be used interchangeably, but it is recommended that header cell be only used for the top and side headers of a table.

Syntax edit

A table cell also must be nested within a <table> tag and a <tr> (table row) tag. If there are more table cell tags in any given row than in any other, the particular <tr> must be given a colspan attribute declaring how many columns of cells wide it should be.

Example edit

An example of an HTML table containing 4 cells:

Cell 1Cell 2
Cell 3Cell 4

HTML source: 

<table border="1">
  <tr>
    <td>
      Cell 1
    </td>
    <td>
      Cell 2
    </td>
  </tr>
  <tr>
    <td>
      Cell 3
    </td>
    <td>
      Cell 4
    </td>
  </tr>
</table>

Colspan and rowspan edit

Every row must have the same number of table data cells, occasionally table data cells have to span more than one column or row. In this case the tags colspan and/or rowspan are used - where they are set to a number.




<-- This row has three table data cells


<-- This row has two. The first uses colspan="2"



<-- This row has three table data cells, but one spans two rows because it uses rowspan="2"


<-- This row has only two table data cells, because its first is being taken up

See also edit

External links edit

  • TH and TD elements
  • DHTML Reference: td
  • TD Tag