ISALPHA(3) NEWLIB ISALPHA(3)NAME
3.2 `isalpha'--alphabetic character predicate
SYNOPSIS
#include <ctype.h>
int isalpha(int C);
DESCRIPTION
`isalpha' is a macro which classifies ASCII integer values by table
lookup. It is a predicate returning non-zero when C represents an
alphabetic ASCII character, and 0 otherwise. It is defined only when
`isascii'(C) is true or C is EOF.
You can use a compiled subroutine instead of the macro definition by
undefining the macro using ``#undef isalpha''.
RETURNS
`isalpha' returns non-zero if C is a letter (`A'-`Z' or `a'-`z').
PORTABILITY
`isalpha' is ANSI C.
No supporting OS subroutines are required.
SEE ALSOisalpha is part of the library. The full documentation for is main‐
tained as a Texinfo manual. If info and are properly installed at your
site, the command
info
will give you access to the complete manual.
NEWLIB April 2010 ISALPHA(3)
