Notice that in the example above, the two li:nth-child selector rules coincide on the eleventh li element. Since rules that appear later in the code override earlier rules of the same type, in this case, “List 11” was given a yellow background color.
In addition to using formulas, you can also use keywords such as odd and even in conjunction with the :nth-child selector. For example, :nth-child(odd) would select all the odd-numbered child elements, while :nth-child(even) would select all the even-numbered child elements.
