Nested IF formulas get unreadable fast. IFS and SWITCH were built to fix that — here's when each one wins.
=IF(condition, value_if_true, value_if_false)
=IF(B2>1000, "High", "Low")Clean and simple for one condition. Gets messy fast when you need more than two outcomes.
=IF(B2>10000, "A", IF(B2>5000, "B", IF(B2>1000, "C", "D")))
-- Works but becomes unreadable past 3 levels
-- Excel allows up to 64 nested IFs (please don't)=IFS(condition1, result1, condition2, result2, ..., TRUE, default)
=IFS(B2>10000, "A", B2>5000, "B", B2>1000, "C", TRUE, "D")
-- Same result as the nested IF above but readable
-- The TRUE at the end is the default (catch-all)IFS is evaluated top to bottom — the first condition that's TRUE wins. Always add TRUE, "default" at the end to avoid #N/A errors when nothing matches.
=SWITCH(expression, value1, result1, value2, result2, ..., default)
=SWITCH(B2, "N", "North", "S", "South", "E", "East", "Unknown")
-- Cleaner than IFS when you're matching exact values| Situation | Best function |
|---|---|
| One condition, two outcomes | IF |
| Multiple ranges/conditions (greater than, less than) | IFS |
| Matching exact values (codes, categories, names) | SWITCH |
| Need to work in Excel 2016 or earlier | Nested IF (IFS/SWITCH not available) |
For range-based conditions (greater than, between, less than), use IFS. For exact value matching (department codes, status labels, country codes), use SWITCH. Both are dramatically more readable than nested IF for more than two outcomes.
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