TRIM and PROPER functions in Excel: Excel learning resource
TRIM and PROPER functions in Excel
Extracted from saved YouTube search results - titled "TRIM and PROPER functions in", filed under Formulas & Functions. It's a video from Mike Tholfsen — use it to practice Formula syntax and operators and Lookup formulas.
What to practice while watching
- Formula syntax and operators
- Lookup formulas
- Conditional logic
- Dynamic array formulas
Recommended learning path
Start by watching the lesson once without pausing, then reopen Excel and rebuild the example with your own small dataset. Save one clean practice workbook before moving to the next topic.
Source details
- Channel: Mike Tholfsen
- Format: video
- Level: Mixed
- Topic: Formulas & Functions
- Listing source: saved YouTube search capture, filed by topic
Go deeper with this skill
Write formulas that are correct, readable, and resilient when the workbook changes. For this article, the goal is to practice: Extracted from saved YouTube search results - titled "TRIM and PROPER functions in", filed under Formulas & Functions. It's a video from Mike Tholfsen — use it to practice Formula syntax and operators and Lookup formulas.
Practice workbook setup
Create a small table with clean headers, sample edge cases, and expected outputs you can check manually.
Practice workflow
- Write the business rule in plain English before writing the formula.
- Build the formula in small pieces and test each piece.
- Use absolute references, table references, or named ranges intentionally.
- Test blanks, missing values, duplicate matches, and unexpected text.
Quality checks
- The formula returns the expected result for normal and edge-case rows.
- References point to stable ranges or tables.
- Someone else can understand the formula after reading the labels around it.
Common mistakes
- Fixing one row without testing the rest of the column.
- Using approximate match or partial criteria without meaning to.
- Letting hidden spaces or text numbers cause false mismatches.
Next actions
- Create three test rows that should return different outcomes.
- Compare the result with an alternate formula or manual filter.
Formula focus: even if this workflow is not formula-heavy, add one check cell that confirms the final output still matches the source data.
