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JavaScript atan2() Method: Math Object

Description

The atan2() method of math object is used to get the arctangent of the quotient of its arguments.

Version

Implemented in JavaScript 1.0

Syntax

atan2(y, x)

Parameter

Both y, x refer numbers.

js-math-object-join

Example:

The following web document demonstrates how the atan2() method can be used.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>JavaScript Math object - atan2() method example</title>
</head>
<body>
<h1 style="color: red">JavaScript Math object : atan2() method</h1>
<hr />
<script type="text/javascript">
//This is done to make the following JavaScript code compatible to XHTML. <![CDATA[
document.write(Math.atan2(0.50,0.50) + "<br />");
document.write(Math.atan2(-0.50,-0.50) + "<br />");
document.write(Math.atan2(5,5) + "<br />");
document.write(Math.atan2(10,20) + "<br />");
x=-5
y=-5
document.write(Math.atan2(x,y) + "<br />");
document.write(Math.atan2(-10,10));
//]]>
</script>
</body>
</html>

View the example in the browser

Supported Browser

Internet Explorer 7 Firefox 3.6 Google Chrome 7 Safari 5.0.1 Opera 10
Yes Yes Yes Yes Yes

See also:

JavaScript Core objects, methods, properties.

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Next: JavaScript ceil() Method: Math Object

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