Magic number (computer science)

In computer science, a "magic number" refers to a unique constant or value that has special significance in programming or data formats. It can help programs identify file types or validate data structures. For example, certain file types begin with specific magic numbers that tell software how to read them. While they are essential for functionality, magic numbers can lead to confusion if not documented, as their purpose and origin may not be clear to others reading the code. Therefore, it’s good practice to define them as named constants for better clarity and maintainability.