ISALPHA(3)                OpenBSD Programmer's Manual               ISALPHA(3)

NAME
     isalpha - alphabetic character test



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() returns
     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 or 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'').

OpenBSD 2.6                      June 29, 1991                               1