jQuery difference between :eq() and :nth-child()

Question

In jQuery, what are some of the key differences between using :eq() and :nth-child() to select any elements ?

Also in general, for the starting index, in which case

Answer 1

$("#dataTable tr:nth-child(1) td:nth-child(2)").html();

here dataTable is a table

    

        
Name
        
EnrollNo.
    
    

        

           
Somdip
IT001

        
        

           
Sanyal
IT002

        
    

The nth-child selector of jquery will help you to fetch the exact cell values from this table. A practical example where tr:nth-child(1) td:nth-child(2) fetches the 1,2 cell of the table.