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Error numbers

From cppreference.com
< c‎ | error

Each of the macros defined in <errno.h> expands to integer constant expressions with type int, each with a unique positive value. The following constants are defined (the implementation may define more, as long as they begin with 'E' followed by digits or uppercase letters)

Defined in header <errno.h>
EDOM
Mathematics argument out of domain of function
(macro constant)
EILSEQ
(C99)
Illegal byte sequence
(macro constant)
ERANGE
Result too large
(macro constant)

[edit] Example

[edit] See also

macro which expands to POSIX-compatible thread-local error number variable
(macro variable) [edit]
displays a character string corresponding of the current error to stderr
(function) [edit]
returns a text version of a given error code
(function) [edit]