# Javascript Math - atan2 Method

## Description:

This method returns the arctangent of the quotient of its arguments. The atan2 method returns a numeric value between -pi and pi representing the angle theta of an (x,y) point.

## Syntax:

 ```Math.atan2( x, y ) ; ```

Here is the detail of parameters:

• x and y : Numbers.

## Return Value:

Returns the arctangent in radians of a number.

 ```Math.atan2( ±0, -0 ) returns ±PI. Math.atan2( ±0, +0 ) returns ±0. Math.atan2( ±0, -x ) returns ±PI for x < 0. Math.atan2( ±0, x ) returns ±0 for x > 0. Math.atan2( y, ±0 ) returns -PI/2 for y > 0. Math.atan2( ±y, -Infinity ) returns ±PI for finite y > 0. Math.atan2( ±y, +Infinity ) returns ±0 for finite y > 0. Math.atan2( ±Infinity, +x ) returns ±PI/2 for finite x. Math.atan2( ±Infinity, -Infinity ) returns ±3*PI/4. Math.atan2( ±Infinity, +Infinity ) returns ±PI/4. ```

## Example:

 ``` JavaScript Math atan2() Method ```

This will produce following result:

 ```First Test Value : 1.4056476493802698 Second Test Value : 0.16514867741462683 Third Test Value : 3.141592653589793 Fourth Test Value : 2.356194490192345 ```

To understand it in better way you can Try it yourself.