processing-docs/content/api_en/include/while.xml at macos-mac · StudioProcess/processing-docs

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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<name>while</name>
<category>Control</category>
<subcategory>Iteration</subcategory>
<usage>Web &amp; Application</usage>
<image>while_.png</image>
<code><![CDATA[
while (i < 80) {
  line(30, i, 80, i);
  i = i + 5;
<description><![CDATA[
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>.
<br /> <br />
This function can be dangerous because the code inside the <b>while</b> loop will not finish until the expression inside <b>while</b> becomes false. It will lock out all other code from running (e.g., mouse and keyboard events will not be updated). Be careful &mdash; if used incorrectly, this can lock up your code (and sometimes even the Processing environment itself).
]]></description>
while (<c>expression</c>) {
  <c>statements</c>
<parameter>
<label>expression</label>
<description><![CDATA[a valid expression]]></description>
</parameter>
<parameter>
<label>statements</label>
<description><![CDATA[one or more statements]]></description>
</parameter>
<returns></returns>
<availability>1.0</availability>
<type>Structure</type>
<partof>PDE</partof>

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