jQuery: even selectors
Definition and Usage
: Even selectors select every element with even index numbers (example: 0,2,4, etc.).
Index starting from 0, the first element is an even number (0), the second element is an odd number (1), and so on.
The most common usage: used in conjunction with other selectors, select the specified combination of each even-numbered elements (such as the above example).
Tip: Use : odd selectors to select elements with odd-numbered.
grammar
$(":even")