Excel's spill range is a product of using dynamic array functions. Learn how the spill range fulfills these functions.

Learn Excel 365 formulas fast! From AutoSum to Intellisense, learn how to work smarter and analyze data with ease. Tips, ...

When counting unique values in Microsoft Excel, use UNIQUE() as a helper function and avoid more complicated expressions.

Check each column individually, and put a 1 or a 0 in a cell below each column. Then test that row of values for a 1. Not pretty, but functional.

Download a free copy of the How-To Geek Advanced Excel Test workbook. After you click the link, you'll find the download button in the top-right corner of your screen.

SUM is the spreadsheet equivalent of an open invite: it welcomes everything into the total, whether it belongs there or not.