-.\" $MirOS: src/bin/mksh/mksh.1,v 1.343 2014/10/03 12:35:38 tg Exp $
+.\" $MirOS: src/bin/mksh/mksh.1,v 1.344 2014/10/07 15:30:12 tg Exp $
.\" $OpenBSD: ksh.1,v 1.153 2014/08/17 07:15:41 jmc Exp $
.\"-
.\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
.\" with -mandoc, it might implement .Mx itself, but we want to
.\" use our own definition. And .Dd must come *first*, always.
.\"
-.Dd $Mdocdate: October 3 2014 $
+.Dd $Mdocdate: October 7 2014 $
.\"
.\" Check which macro package we use, and do other -mdoc setup.
.\"
as numeric arguments to the
.Ic test
command, and as the value of an assignment to an integer parameter.
+.Em Warning :
+This also affects implicit conversion to integer, for example as done by the
+.Ic let
+command.
+.Em Never
+use unchecked user input, e.g. from the environment, in arithmetics!
.Pp
Expressions are calculated using signed arithmetic and the
.Vt mksh_ari_t