Slow lookup formulas can kill productivity when working with large datasets. To cope with that, I've tested Excel's optimal lookup functions and their combinations for building lightning-fast formulas ...

The asterisk (*) is the wildcard character that represents any sequence of characters, including when there are no characters at all. It’s the most flexible of the bunch, since it can replace any ...

Begin the process by making an invoice template that includes pre-formatted fields for item descriptions, quantities, unit prices, and customer information. This template will be the cornerstone of ...

Those of us over a certain age will remember using paper lookup tables for logarithms or trigonometry functions. Those who are younger will have been exposed to lookup tables in their programming ...