Manual Pages  — TOWUPPER

towupper – lower case to upper case letter conversion (wide character version)

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES SEE ALSO STANDARDS

Standard C Library (libc, -lc)

#include <wctype.h>

wint_t
towupper(wint_t wc);

The towupper() function converts a lower-case letter to the corresponding upper-case letter.

If the argument is a lower-case letter, the towupper() function returns the corresponding upper-case letter if there is one; otherwise the argument is returned unchanged.

The towupper() function conforms to ISO/IEC 9899:1999 ("ISO C99").