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CSSStyleDeclaration

JavaScript atan() Method

< JavaScript Math Object

Example

Return the arctangent of a specified number:

Math.atan(2);

The result will be:

1.1071487177940904

Try it Yourself »

Definition and Usage

The atan() method returns the arctangent of a number as a value between -PI/2 and PI/2 radians.

Browser Support

Method
atan()	Yes	Yes	Yes	Yes	Yes

Syntax

Math.atan(x)

Parameter Values

Parameter	Description
x	Required. A number

Technical Details

Return Value:	A Number, from -PI/2 to PI/2, or NaN if the value is empty
JavaScript Version:	1.0

< JavaScript Math Object