Formulas are powerful tools for performing calculations and analyzing data in Excel. In this beginner’s guide, you’ll learn how to use formulas and explore some popular built-in functions.

You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.

All formulas in Excel begin with an equal sign, so the first symbol there is introducing the formula, not specifying anything about equality. To see if it's less than or equal to five, you'd use ...