new file mode 100644
--- /dev/null
+++ b/scripts/strings/isletter.m
@@ -0,0 +1,34 @@
+## Copyright (C) 1996 John W. Eaton
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2, or (at your option)
+## any later version.
+##
+## Octave 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
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, write to the Free
+## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+## 02111-1307, USA.
+
+## usage: isletter (s)
+##
+## See also: isalpha
+
+## Author: jwe
+
+function retval = isletter (s)
+
+  if (nargin != 1)
+    usage ("isletter (s)");
+  endif
+
+  retval = isalpha (s);
+
+endfunction