isalpha man page on MirBSD
[printable version]
ISALPHA(3) BSD 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").
CAVEATS
The argument to isalpha() must be EOF or representable as an unsigned
char; otherwise, the result is undefined.
MirOS BSD #10-current June 29, 1991 1
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