Build flexible Excel functions that automatically handle blanks, defaults, and overrides without messy nested IFs.

Dynamic arrays change the rules for formula output in Excel. When I write a formula that returns a list by default, I need to decide whether I want the result to spill across a range of cells or ...

Have you ever crafted the perfect Excel formula, only to be greeted by the dreaded #VALUE! error instead of the seamless results you expected? It’s a frustrating ...