JavaScript atan2() Method: Math Object

Last update on August 19 2022 21:50:37 (UTC/GMT +8 hours)

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

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