E:nth-child

Matches an E element, the n-th child of its parent. (Source: W3C)

HTML:

1. <div>
2. <p>Lorem ipsum dolor sit amet, consectetur</p>
3. <p>Lorem ipsum dolor sit amet, consectetur</p>
4. <p>Lorem ipsum dolor sit amet, consectetur</p>
5. </div>

CSS:

1. p{font-style:normal}
2. p:nth-child(2){font-style:italic}
3. p:nth-child(odd){color:green}

Output:

In the example, the second paragraph should be set in italics and the first, third and fifth (odd) should be green.