isupper(3) - NetBSD Manual Pages

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ISUPPER(3)                NetBSD Programmer's Manual                ISUPPER(3)


NAME
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 im- plementation-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 let- ters.
RETURN VALUES
The isupper() macro returns zero if the character tests false and returns non-zero if the character tests true.
SEE ALSO
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 C''). NetBSD 1.6 June 29, 1991 1
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