NAME
    iscntrl - whether character is a control character

SYNOPSIS
    iscntrl(c)

TYPES
    c           string

    return      int

DESCRIPTION
    Determine if c is a control character.  This function will return 1 if c is
    alphabetic, 0 otherwise.

EXAMPLE
    ; print iscntrl("A"), iscntrl("a"), iscntrl("1"), iscntrl("\t")
    0 0 0 1

LIMITS
    none

LINK LIBRARY
    none

SEE ALSO
    islower, isupper, isalnum, isalpha, isdigit, isgraph, isprint,
    ispunct, isspace, isxdigit

## Copyright (C) 2013  Christoph Zurnieden
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
##
## Under source code control:   2013/09/01 18:10:53
## File existed as early as:    2013
##
## chongo <was here> /\oo/\     http://www.isthe.com/chongo/
## Share and enjoy!  :-)        http://www.isthe.com/chongo/tech/comp/calc/
