Formula True-false options relate to a question with two results that constitute each other's opposites. Excel's IF function distinguishes between the two states and establishes what they mean.

For that, you’ll need a formula that returns true when the value is unique and false when the value is a duplicate. To accomplish this, we’ll use the COUNTIF () function in the form: ...

If you want duplicate values to stand out in an Excel spreadsheet, you can choose between two conditional formatting rules.

Microsoft Excel comes with a lot of built-in functionality that doesn't restrict you to comparing data in two columns using only one method.