What is pre defined codes?

Predefined codes are specific codes or identifiers that are established in advance for categorizing or processing data within a system. They are often used in programming, data analysis, and survey research to streamline data entry and ensure consistency. For example, in a survey, predefined codes might be assigned to responses for easy analysis, such as assigning "1" for "Yes" and "2" for "No." Using predefined codes helps facilitate efficient data management and interpretation.