In CSS3, odd and even are used as keywords in pseudo-class selectors to select specified elements. odd represents odd elements and even represents even elements; odd and even are often used with ":nth-child(n )" selector, the syntax is "element: selector (odd or even) {css style code}".

The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.

What is the usage of odd and even in css3

odd represents an odd number and even represents an even number.

odd and even are often used to select specified elements in pseudo-class selectors.

The example is as follows:

      
  
This is a heading
 
The first paragraph.
 
The second paragraph.
 
The third paragraph.
 
注意: Internet Explorer 8 and以及更早版本的浏览器 :nth-child()选择器.
  

Output result:

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