Errnoverdier

Errnoverdier, also known as error numbers or error codes, are predefined constants used in programming to indicate the occurrence of an error during the execution of a function or system call. These values are typically defined in the errno.h header file in the C programming language and are used to provide detailed information about the nature of the error encountered. Each errnoverdier has a unique integer value and a corresponding symbolic name, such as ENOENT for "No such file or directory" or EPERM for "Operation not permitted." When a system call or library function fails, it sets the global variable errno to one of these values, allowing the programmer to check and handle the error appropriately. This mechanism is crucial for debugging and ensuring robust error handling in software applications.