can i create a table in the jotform?This can be any table having specified number of columns and rows and user can enter the data.

You can create a user fill-able table by using the spreadsheet widget.

http://widgets.jotform.com/widget/spreadsheet

You can also adapt the matrix tool under the survey tool s option to act like a table, you just need to change the input type to text box to allow collection of typed user data.