Re: Visibility of value of variable bindings in module
- To: mathgroup at smc.vnet.net
- Subject: [mg121232] Re: Visibility of value of variable bindings in module
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Mon, 5 Sep 2011 07:07:03 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
On 9/4/11 at 6:05 PM, cawright.99 at gmail.com (caw) wrote:
>Module[{x = Sum[i, {i, Length[{1, 2, 3}]}], y = x + 1}, Print[y];
>Print[x]]
>prints out:
>1 + x
>6
>So, in the variable declaration section of the Module statement, the
>binding of x to 6 isn't visible to y. (It's a bit like let and let*,
>but not)
>Is there a form which will allow the bindings to be visible within
>the variable declaration section?
Not using Module. But clearly you could do
Module[{x = Sum[i, {i, Length[{1, 2, 3}]}], y}, y = x + 1; Print[y];
Print[x]]
7
6
Or you could use Block instead of Module
Block[{x = Sum[i, {i, Length[{1, 2, 3}]}], y = x + 1}, Print[y];
Print[x]]
7
6