Re: First question

• To: mathgroup at smc.vnet.net
• Subject: [mg52111] Re: First question
• From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
• Date: Thu, 11 Nov 2004 04:52:14 -0500 (EST)
• Organization: Uni Leipzig
• References: <cmsp1e\$bah\$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

```Hi,

the manual say

"Unless an explicit Return is used, the value returned by Do is Null."

and that mean tha Return[] in a Do[]-Loop terminate the Do[] loop

and not the function. You mean

lmaa [] := Module[{i},
res = Do[
If[i > 3, Return[{"from inside"}]],
{i, 0, 5}
];
If[Null === res, {"not from inside"}, res]
]

or

lmaa [] := Module[{i = 0},
While[i < 6,
If[i > 3, Return[{"from inside];
i++
];
{"not from inside"}
]

lmaa [] := Module[{i},
For[i = 0, i < 6, i++,
If[i > 3, Return[{"from inside"}]]
];
{"not from inside"}
]

Regards

Jens

<dto_mba at skynet.be> schrieb im Newsbeitrag news:cmsp1e\$bah\$1 at smc.vnet.net...
> How to exit directly and immediately a module from inside a loop with
> a certain value ?
> Return seems not to work.
>
> Example:
>
> lmaa := Module[
> {},
>   Do[
>     If[i > 3, Return[{"from inside"}]],
>     {i, 1, 5}
>   ];
>   Return[{"not from inside"}]
> ]
>
>
> lmaa
>
> {not from inside}
>
> Best
>
> Gilbert Gosseyn
>

```

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