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## About this lesson

Use to understand the anatomy of Excel functions and what their components mean.

## Exercise files

Download this lessonâ€™s related exercise files.

Function Anatomy - Begin.xlsx23.8 KB Function Anatomy - Complete.xlsx

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## Quick reference

### Function Anatomy

Understanding Excel Function Anatomy.

### When to use

Use to understand the anatomy of Excel functions, and what their components mean.

### Instructions

#### What is a Function?

- A pre-packaged algorithm that accepts parameters to return a result.

#### Key points to remember

- Functions must be used inside formulas.
- The function name is always followed by ( )
- The parameters for the current function are shown in Excelâ€™s â€śIntellisenseâ€ť.
- The current parameter is always listed in bold.
- Optional parameters are surrounded by [ ]
- Parameters not enclosed in [ ] are required.
- Ranges can be used as parameters.
- Other functions can be used as parameters.

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