228 lines
7.1 KiB
HTML
228 lines
7.1 KiB
HTML
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<title>while() | reference | Processing.js</title>
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<span class="tagline">a port of the Processing Visualization Language</span>
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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>while()</h3></td>
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</tr>
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<tr class="">
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<th scope="row">Examples</th>
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<td><div class="example"><img src="../while_.gif" alt="example pic" /><pre class="margin">int i=0;
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while(i<80) {
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line(30, i, 80, i);
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i = i + 5;
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}</pre></div></td>
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</tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>Controls a sequence of repetitions. The <b>while</b> structure executes a series of statements continuously while the <b>expression</b> is <b>true</b>. The expression must be updated during the repetitions or the program will never "break out" of <b>while</b>.
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<br /><br />
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This function can be dangerous because the code inside the while() loop will not finish until the expression inside while() becomes true. It will lock out all other code from running (mouse events will not be updated, etc.) So be careful because this can lock up your code (and sometimes even the Processing environment itself) if used incorrectly.</td>
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</tr>
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<tr class="">
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<th scope="row">Syntax</th>
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<td><pre>while (<kbd>expression</kbd>) {
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<kbd>statements</kbd>
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}</pre></td>
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</tr>
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<tr class="">
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<th scope="row">Parameters</th>
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<td><table cellpadding="0" cellspacing="0" border="0">
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<tr class="">
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<th scope="row">expression</th>
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<td>a valid expression</td>
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</tr>
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<tr class="">
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<th scope="row">statements</th>
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<td>one or more statements</td>
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</tr>
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</table></td>
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</tr>
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<tr class="">
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<th scope="row">Usage</th>
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<td>Web & Application</td>
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<tr class="">
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<th scope="row">Related</th>
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<td><a href="../for_.1">for()</a><br /></td>
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<p>This reference is licensed under the CC BY-NC-SA 2.0 license:</p>
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Processing is an open visualization language developed by
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and originally ported to Javascript by
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