# Math.atan Function (JavaScript)

Returns the arctangent of a number.

## Syntax

```
Math.atan(number)
```

## Remarks

The required `number`

argument is a numeric expression for which the arctangent is needed.

The return value is the arctangent of the `number`

argument, 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.

## See Also

Math.acos Function

Math.asin Function

Math.atan2 Function

Math.cos Function

Math.sin Function

Math.tan Function

Math Object