<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<root>

<name>while</name>

<category>Control</category>

<subcategory>Iteration</subcategory>

<usage>Web &amp; Application</usage>

<example>

<image>while_.png</image>

<code><![CDATA[

int i = 0;

while (i < 80) {

line(30, i, 80, i);

i = i + 5;

}

]]></code>

</example>

<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>

<syntax>

while (<c>expression</c>) {

<c>statements</c>

}

</syntax>

<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>

<related>

for

</related>

<availability>1.0</availability>

<type>Structure</type>

<partof>PDE</partof>

</root>