# Math.atan2 Function (JavaScript)

Returns the angle (in radians) from the X axis to a point (*y*,*x*).

## Syntax

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

## Parameters

*x*

Required. A numeric expression representing the cartesian x-coordinate.

*y*

Required. A numeric expression representing the cartesian y-coordinate.

## Remarks

The return value is between *-pi* and *pi*. It represents the angle of the supplied (*y*,*x*) point, in radians.

**Applies To**: Math Object

## Requirements

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.