ISALPHA(3)                386BSD 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 and returns
     non-zero if the character tests true.

SEE ALSO
     isascii(3),  isalnum(3),  iscntrl(3),  isdigit(3),  isgraph(3),
     islower(3),  isprint(3),  ispunct(3),  isspace(3),  isupper(3),
     isxdigit(3),  toascii(3),  tolower(3),  toupper(3),  stdio(3) ascii(7)

STANDARDS
     The isalpha() function conforms to ANSI C3.159-1989 (``ANSI C'').

BSD Experimental                 June 29, 1991                               1