foreach loop question with datatable

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i have a data table and i want to write a loop where i can render a html table and i want to do it from scratch (not abstracted data sources)i want to have the number of items per row a variable.what is the correct loop syntax given a datatable with X number of records where each record is one cell.so if i have 20 records and my NumberOfItemsPerRow = 5, i would have a html table with 4 rows.