How to Use Scan Function In Excel
The SCAN function in Excel is a powerful dynamic array function introduced in Excel 365. It processes each item in an array step-by-step, carrying forward the result from the previous step — like a “running total” or “running text”.
It’s especially useful for:
Running totals
Accumulating text
Conditional running calculations
Step-by-step logic on arrays
The SCAN function is like a custom running calculator inside Excel.
It’s perfect when:
You want results updated step-by-step
Need dynamic logic (text, math, comparisons)
Building interactive dashboards
Once you combine it with functions like LAMBDA, TEXTJOIN, or IF, you unlock advanced Excel automation — without VBA.
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