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<title>switch \ Language (API) \ Processing 2+</title>
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<meta name="Description" content="Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts. Since 2001, Processing has promoted software literacy within the visual arts and visual literacy within technology." />
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<a href="index.html" class='active'>Language</a><br>
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<a href="libraries/index.html" >Libraries</a><br>
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<a href="tools/index.html">Tools</a><br>
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<a href="environment/index.html">Environment</a><br>
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<!-- ==================================== CONTENT - Headers ============================ -->
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<div class="content">
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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>switch</h3></td>
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</tr>
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<tr class="">
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<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
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int num = 1;
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switch(num) {
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case 0:
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println("Zero"); // Does not execute
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break;
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case 1:
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println("One"); // Prints "One"
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break;
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}
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</pre></div>
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<hr class="noshade" noshade="noshade" size="1">
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<div class="example"><pre >
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char letter = 'N';
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switch(letter) {
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case 'A':
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println("Alpha"); // Does not execute
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break;
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case 'B':
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println("Bravo"); // Does not execute
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break;
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default: // Default executes if the case labels
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println("None"); // don't match the switch parameter
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break;
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}
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</pre></div>
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<hr class="noshade" noshade="noshade" size="1">
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<div class="example"><pre >
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// Removing a "break" enables testing
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// for more than one value at once
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char letter = 'b';
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switch(letter) {
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case 'a':
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case 'A':
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println("Alpha"); // Does not execute
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break;
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case 'b':
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case 'B':
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println("Bravo"); // Prints "Bravo"
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break;
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}
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</pre></div>
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</td></tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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Works like an <b>if else</b> structure, but <b>switch</b> is more convenient when you need to select between three or more alternatives. Program controls jumps to the case with the same value as the expression. All remaining statements in the switch are executed unless redirected by a <b>break</b>. Only primitive datatypes which can convert to an integer (byte, char, and int) may be used as the <b>expression</b> parameter. The default is optional.
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</td>
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</tr>
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<tr class=""><th scope="row">Syntax</th><td><pre>
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switch(expression)
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{
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case label:
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statements
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case label: // Optional
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statements // "
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default: // "
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statements // "
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}
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</pre></td></tr>
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<tr class=""> <th scope="row">Parameters</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row" class="code">expression</th>
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<td>byte, char, or int</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">label</th>
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<td>byte, char, or int</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">statements</th>
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<td>one or more statements to be executed</td>
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</tr></table></td> </tr>
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<tr class=""><th scope="row">Related</th><td><a class="code" href="case.html">case</a><br />
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<a class="code" href="default.html">default</a><br />
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<a class="code" href="break.html">break</a><br />
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<a class="code" href="if.html">if</a><br />
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<a class="code" href="else.html">else</a><br /></td></tr>
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</table>
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Updated on April 30, 2017 02:33:23pm EDT<br /><br />
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<div id="copyright">Processing is an open project intiated by <a href="http://benfry.com/">Ben Fry</a> and <a href="http://reas.com">Casey Reas</a>. It is developed by a <a href="http://processing.org/about/people/">team of volunteers</a>.</div>
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