What does the ISERROR function do in Excel?

The ISERROR function in Excel is designed to check if a specific value or expression results in an error. When applied, it returns TRUE if the value is an error (such as #DIV/0!, #N/A, #VALUE!, etc.) and FALSE if it is not. This functionality is particularly useful when you want to handle errors in your formulas without causing your entire calculation to fail.

For instance, if a formula may result in an error due to a division by zero, wrapping that formula within the ISERROR function allows you to manage the error gracefully. This can be beneficial in maintaining the integrity of data analyses and ensuring that subsequent calculations or visualizations are not adversely affected by error values.

In contrast, other functions like counting errors or checking for missing values pertain to different aspects of data handling in Excel, which do not align with the specific purpose of ISERROR.