Data Validation in Excel – Rules, Restrictions & Practical Examples

Описание: This topic explains how Data Validation is used in Excel to control the type of data entered into a cell. You will learn how to create drop-down lists, set number limits, restrict dates, allow only specific text formats, and prevent incorrect data entry with custom validation formulas.
Practical examples and real-life use cases—such as validating student marks, employee attendance, and form inputs—help you understand how Data Validation improves accuracy and prevents errors in reports and dashboards.