Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

toupper(3) [mojave man page]

TOUPPER(3)						   BSD Library Functions Manual 						TOUPPER(3)

NAME
toupper, toupper_l -- lower case to upper case letter conversion LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int toupper(int c); #include <ctype.h> #include <xlocale.h> int toupper_l(int c, locale_t loc); DESCRIPTION
The toupper() function converts a lower-case letter to the corresponding upper-case letter. The argument must be representable as an unsigned char or the value of EOF. Although the toupper() function uses the current locale, the toupper_l() function may be passed a locale directly. See xlocale(3) for more information. RETURN VALUES
If the argument is a lower-case letter, the toupper() function returns the corresponding upper-case letter if there is one; otherwise, the argument is returned unchanged. COMPATIBILITY
The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales with large character sets is considered obsolete and may not be supported in future releases. The towupper() function should be used instead. SEE ALSO
ctype(3), isupper(3), towupper(3), xlocale(3) STANDARDS
The toupper() function conforms to ISO/IEC 9899:1990 (``ISO C90''). BSD
July 17, 2005 BSD

Check Out this Related Man Page

TOUPPER(3)						   BSD Library Functions Manual 						TOUPPER(3)

NAME
toupper -- lower case to upper case letter conversion LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int toupper(int c); DESCRIPTION
The toupper() function converts a lower-case letter to the corresponding upper-case letter. RETURN VALUES
If the argument is a lower-case letter, the toupper() function returns the corresponding upper-case letter if there is one; otherwise the argument is returned unchanged. SEE ALSO
ctype(3), isalnum(3), isalpha(3), isascii(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3), toascii(3), ascii(7) STANDARDS
The toupper() function conforms to ANSI X3.159-1989 (``ANSI C89''). CAVEATS
The argument to toupper() must be EOF or representable as an unsigned char; otherwise, the behavior is undefined. See the CAVEATS section of ctype(3) for more details. BSD
April 17, 2008 BSD
Man Page