Named Constants
Named constants are symbolic names assigned to fixed values in programming, used to represent unchanging data such as numbers, strings, or other literals. They improve code readability, maintainability, and reduce errors by replacing 'magic numbers' or hard-coded values with meaningful identifiers. This concept is fundamental across programming languages, often implemented using keywords like 'const', 'final', or 'define'.
Developers should use named constants to enhance code clarity and prevent bugs, especially when values are reused multiple times or have specific meanings (e.g., mathematical constants like PI, configuration settings, or error codes). They are essential in scenarios requiring easy updates, such as when changing a value globally without searching through code, and in team projects to ensure consistency and avoid typos in literal values.