📎 This article includes 1 downloadable practice file ↓
In this article
MAP applies a LAMBDA to every item of one or more arrays and returns an array of results.
Syntax
=MAP(array1, [array2, ...], LAMBDA(a, [b], calculation))| Argument | What it means |
|---|---|
LAMBDA |
Receives one item from each array. |
Examples
Example 1
=MAP(A2:A100, B2:B100, LAMBDA(q, r, IF(q>100, q*r*0.9, q*r)))Line amounts with a 10% discount on large quantities.
MAP in practice
Where you will use it
- Apply a calculation to every item of an array
- Clean several columns at once
- Custom element-wise logic
Worked example
| Case | Formula | Result |
|---|---|---|
| 1 | =ARRAYTOTEXT(MAP(CHOOSE(A2,{100,250,40},{" pune ","DELHI"},{5,-3}),LAMBDA(x,IF(ISNUMBER(x),ABS(x)*1.18,PROPER(TRIM(x)))))) | 118, 295, 47.2 |
| 2 | =ARRAYTOTEXT(MAP(CHOOSE(A3,{100,250,40},{" pune ","DELHI"},{5,-3}),LAMBDA(x,IF(ISNUMBER(x),ABS(x)*1.18,PROPER(TRIM(x)))))) | Pune, Delhi |
| 3 | =ARRAYTOTEXT(MAP(CHOOSE(A4,{100,250,40},{" pune ","DELHI"},{5,-3}),LAMBDA(x,IF(ISNUMBER(x),ABS(x)*1.18,PROPER(TRIM(x)))))) | 5.9, 3.54 |
Results calculated in Excel.
Mistakes people make
| Mistake | What to do instead |
|---|---|
| Returning arrays | Each call must return one value |
| Several arrays | They must be the same size |
Related functions
📚 Part of the free Excel course: Beginner → Expert · Try it in the Formula Lab or ask the AI Helper.
⚡ Interactive Practice Lab & Formula Tester:
Test formulas dynamically in our web formula laboratory or download the companion Excel workbook.
📎 Practice files for this article
- 📗Practice workbook: Logic, LET & LAMBDA17 tasks on realistic sales data — type your formula, the Check column turns green when it is right. Answers sheet included.⬇ XLSX · 35 KB
Free to use for learning. Files with macros (.bas) are plain text — import them with Alt+F11 → File → Import File, and always test on a copy.
✨ Ask AI about this article
Stuck on a step? Ask a question and the AI answers using this article.
Free · AI can be wrong