What is a primary reason for using validation techniques on data input?

Using validation techniques on data input is crucial because they help ensure that the data entered is both accurate and acceptable for the application's needs. Validation checks can confirm that the data adheres to specific rules, formats, and ranges before it is processed or stored in a database. This prevents potential issues such as incorrect information being used in calculations, displaying wrong values back to users, or, in more severe cases, system failures due to invalid data types.

The focus of validation is primarily on maintaining data integrity and quality, which is essential for making efficient and informed decisions based on that data. This process often involves various methods, such as format checks (e.g., ensuring email addresses follow a specific pattern) or range checks (e.g., confirming a submitted age is within a reasonable range), directly contributing to the robustness of data handling in software applications.