This formula will always add 100 to the value in A1, even when that value changes.

### Formulas with Functions

Excel contains hundreds of pre-built formulas called functions. You can use functions on their own in formulas, or even combine multiple functions in a single formula. For example, the this formula uses only the MAX function to calculate the maximum value in the first 100 cells in column A: This formula uses the WORKDAY function to return a date 5 working days from a date in A1: In a more complex example, this formula uses two functions to count the letter “a” in A1: See this page for a full explanation of this formula.

### Formulas vs. Functions

All functions are formulas. However, you can create formulas in Excel without any functions at all. For example, this formula adds A1 to A2 without any functions: Author

### Dave Bruns

Hi - I’m Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.