What does a range check validate?

A range check is a validation technique that ensures data inputs are within a specified set of acceptable values or limits. This is crucial for maintaining data integrity and preventing errors that could arise from invalid or unexpected data entries. For example, if a system requires a user to enter their age, a range check might specify that the acceptable values are between 0 and 120. If the user enters a value outside of this range, the system can flag the input as invalid, thus protecting the system from processing erroneous or harmful data.

This type of check is significant in various applications, such as form submissions, database entries, and calculation processes, where inputs need to conform to set criteria to ensure proper functionality and avoid potential system failures. By ensuring that the data falls within a predetermined range of values, range checks contribute to the robust design and reliability of information systems.