# Math.atan2

## Function

Four-quadrant arctangent. Returns the bearing angle in radians based on y and x.

## Syntax

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

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| y | Number | Yes | None | Vertical coordinate. |
| x | Number | Yes | None | The abscissa. |

## Return value

| Type | Description |
| ------ | ------ |
| Int/Float | Returns the bearing angle in radians based on y and x. An Int is returned for integer results, and a Float for non-integer or non-finite results. |

## Example

```bt
result = Math.atan2(0, 1)

// Output: 0
print result
```

## Notes

- The order of parameters is y first, x last.