Use MAP and LAMBDA to build centralized, error-proof, and auto-spilling Excel spreadsheet systems.

LAMBDA defines the custom logic, and SCAN moves that logic through your data range.

Learn the difference between Excel COUNT and COUNTA, plus TEXTBEFORE and TEXTAFTER tricks, so you clean text and totals with confidence.

Have you ever stared at a tangled web of Excel formulas, wondering if there’s a better way to make sense of it all? For many, Excel’s LAMBDA function feels like a cryptic puzzle—powerful but ...