Set to anything ("on", "yes", "true", ...) to ensure table spans entire width available. (Effect is to remove border-spacing and add width:100% to the table's styling.)
|fullwidth=on
not set
class
Class for the table
|class=wikitable|class=infobox|class=sidebar etc.
none
style
CSS styling for the table
|style=width:80%;background:transparent;
none
cols
Number of columns in the table
|cols=4
2
colwidth
Width of each column
|colwidth=6.0em|colwidth=25% etc.
not set
leftright
padding-left:1.6em
|leftright=on
not set
rowstyle
CSS styling for each row
|rowstyle=text-align:center;
not set
col[C]width
Width of column number [C]
|col2width=6.0em|col3width=25% etc.
not set
col[C]class
Class for the cells in column number [C]
|col1class=navbox-group
none
col[C]align
Alignment (left, right, center) for column [C]'s cell contents.
|col4align=right
not set
col[C]style
col[C]nowrap
CSS styling for column [C]'s cells.
padding-left:1.6em
|col3style=background:lavender;
|col1nowrap=on
none
not set
row[R]class
Class for the cells in row [R]
|row10class=navbox-abovebelow
none
row[R]style
CSS styling for cells in row [R]
|row1style=font-weight:bold;
none
class[R].[C]
Class for the cell in row [R], column [C]. Overrides any other class attribution (col[C]class, row[R]class).
none
style[R].[C]
CSS styling for the cell in row [R], column [C]. Overrides any more generalized styling (leftright, col[C]align, row[R]style, etc).
none
Unnamed parameters
Each unnamed parameter is taken to be the next cell in the table, starting at the table's top left corner and working left to right from top to bottom.
Examples
{{Aligned table
|class=wikitable
|cols=3
| A | 1 | a
| B | 2 | b
}}