switch, case, default und break in App Inventor verwenden

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Robert Barion

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Jul 1, 2018, 7:15:40 AM7/1/18

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Kann man sowas in App Inventor umsetzen?

<?php

$spielerA= 16;

$spielerB= 17;

switch ($spielerA - $spielerB) {
    case 2:
        $gewinner = $spielerA;
        break;
    case -2:
        $gewinner = $spielerB;
        break;
    default:
        $gewinner = "KEINER";
        break;
}

echo "Der Gewinner ist " . $gewinner;

Danke für eine Antwort

SteveJG

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Jul 1, 2018, 7:59:05 AM7/1/18

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App Inventor does not have the php switch, case, break or default instructions Robert.

Instead, the Block 'language',provides conditional statements from which a developer can program something similar to what you described

Chapter 18. Programming Your App to Make Decisions

There is no break command. App Inventor processes instructions asynchronously. If one does indeed requires a 'pause', one uses the Clock component. There is no wait or break.

You can learn about the various App Inventor commands here

or using these resources to help you learn to use the AI2 tools A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook http://www.appinventor.org/book2 ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.

There is a free programming course here http://www.appinventor.org/content/CourseInABox/Intro and the aia files for the projects in the book are here: http://www.appinventor.org/bookFiles

How to do a lot of basic things with App Inventor are described here: http://www.appinventor.org/content/howDoYou/eventHandling .

Also look here http://kio4.com/appinventor/index.htm

Regards,

Steve

Chris Ward

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Jul 1, 2018, 8:22:36 AM7/1/18

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Hello Robert

Switch (or Select, depending on language) is indeed more elegant than a series of If/ElseIf statements. Java of course has a Switch statement so hopefully at some time in the future App Inventor can be enhanced.