Functions are predefined formulas in Excel that perform specific calculations or operations. Instead of writing every calculation from scratch, users can apply built-in tools like SUM, AVERAGE, COUNT, and IF.
Functions save time, reduce errors, and make spreadsheets more powerful. Learning how functions work is one of the most important steps in moving from beginner to confident user.
Why It Matters
- Provides reusable tools for calculations
- Saves time and improves accuracy
- Builds the foundation for advanced Excel skills
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