isalpha(3) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
ISALPHA(3)                NetBSD Programmer's Manual                ISALPHA(3)


NAME
isalpha - alphabetic character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h> int isalpha(int c);
DESCRIPTION
The isalpha() function tests for any character for which isupper(3) or islower(3) is true and for which none of iscntrl(3), isdigit(3), ispunct(3), or isspace(3) is true. In the ``C'' locale, isalpha() re- turns true only for the characters for which isupper(3) or islower(3) is true.
RETURN VALUES
The isalpha() macro returns zero if the character tests false and returns non-zero if the character tests true.
SEE ALSO
isalnum(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)
STANDARDS
The isalpha() function conforms to ANSI X3.159-1989 (``ANSI C''). NetBSD 1.6 June 29, 1991 1
Powered by man-cgi (2024-03-20). Maintained for NetBSD by Kimmo Suominen. Based on man-cgi by Panagiotis Christias.