The Data Validation window that pops up allows you to set your criteria in many ways. For our example, choose Whole Number for Allow:, greater than or equal to for Data:, and -700 for Minimum:.

A common use of data validation is to create a drop-down list. Use it to restrict the type of data that users enter into an Excel cell.

Learn how to create a drop-down list using Data Validation in Excel. Data Validation limits the type of data that can be entered into a cell.