Grid - Mass update?

Using the grid, can we do mass update.
eg we select 5 rows and the update one column say price on all 5 rows to $15.
(instead of updating price in each row one by by one to $15)

There is no such inbuilt functionality. You should iterate through selected rows and update values at each row one by one. Please find more information about iteration in grid here docs.dhtmlx.com/doku.php?id=dhtmlxgrid:iterating