Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

isupper(3) [netbsd man page]

ISUPPER(3)						   BSD Library Functions Manual 						ISUPPER(3)

isupper -- upper-case character test LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int isupper(int c); DESCRIPTION
The isupper() function tests for any upper-case letter or any of an implementation-defined set of characters for which none of iscntrl(3), isdigit(3), ispunct(3), or isspace(3) is true. In the ``C'' locale, isupper() returns true only for the characters defined as upper-case letters. RETURN VALUES
The isupper() function returns zero if the character tests false and returns non-zero if the character tests true. SEE ALSO
ctype(3), isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7) STANDARDS
The isupper() function conforms to ANSI X3.159-1989 (``ANSI C89''). CAVEATS
The argument to isupper() 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

Check Out this Related Man Page

CTYPE(3)						   BSD Library Functions Manual 						  CTYPE(3)

digittoint, isalnum, isalpha, isascii, isblank, iscntrl, isdigit, isgraph, ishexnumber, isideogram, islower, isnumber, isphonogram, isprint, ispunct, isrune, isspace, isspecial, isupper, isxdigit, toascii, tolower, toupper -- character classification macros LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int digittoint(int c); int isalnum(int c); int isalpha(int c); int isascii(int c); int iscntrl(int c); int isdigit(int c); int isgraph(int c); int ishexnumber(int c); int isideogram(int c); int islower(int c); int isnumber(int c); int isphonogram(int c); int isspecial(int c); int isprint(int c); int ispunct(int c); int isrune(int c); int isspace(int c); int isupper(int c); int isxdigit(int c); int toascii(int c); int tolower(int c); int toupper(int c); DESCRIPTION
The above functions perform character tests and conversions on the integer c. They are available as macros, defined in the include file <ctype.h>, or as true functions in the C library. See the specific manual pages for more information. Extended locale versions of these functions are documented in ctype_l(3). See xlocale(3) for more information. SEE ALSO
digittoint(3), isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), isideogram(3), islower(3), isphonogram(3), isprint(3), ispunct(3), isrune(3), isspace(3), isspecial(3), isupper(3), isxdigit(3), toascii(3), tolower(3), toupper(3), wctype(3), ascii(7), ctype_l(3) STANDARDS
These functions, except for digittoint(), isascii(), ishexnumber(), isideogram(), isnumber(), isphonogram(), isrune(), isspecial() and toascii(), conform to ISO/IEC 9899:1990 (``ISO C90''). BSD
March 30, 2004 BSD
Man Page