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The Repeating Rows Field Type is a SharePoint custom field type. This field enables you to produce list forms that include multiple rows.
A common example of multi-rows form is the Expense form; that form includes multiple expense rows, each includes date, cost$ and type of expense.
No. The Repeating Rows field type enhances the out-of-the-box SharePoint list forms, and does not require InfoPath forms. All you need is just the most basic SharePoint edition (WSS/Foundation or SharePoint 2010/2013/2016).