NAME

toupper - transliterate lower-case characters to upper-case

 SYNOPSIS

#include <ctype.h>

int toupper(int c);

 DESCRIPTION

The toupper() function has as a domain a type int, the value of which is representable as an unsigned char or the value of EOF. If the argument has any other value, the behaviour is undefined. If the argument of toupper() represents a lower-case letter, and there exists a corresponding upper-case letter (as defined by character type information in the program locale category LC_CTYPE), the result is the corresponding upper-case letter. All other arguments in the domain are returned unchanged.

 RETURN VALUE

On successful completion, toupper() returns the upper-case letter corresponding to the argument passed.

 ERRORS

No errors are defined.

 EXAMPLES

None.

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

setlocale(), <ctype.h>, the XBD specification, Locale .

DERIVATION

Derived from Issue 1 of the SVID.