HTML · Table and list attributes

span (table attribute)

Makes a col or colgroup span several columns.

htmlRunnable example html course

Syntax

span="2"

Example

Try it

<table><colgroup><col span="2"></colgroup><tr><th>A</th><th>B</th></tr></table>

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.