---
title: math.atan2() function
description: >
  `math.atan2()` returns the artangent of `x/y`, using the signs
  of the two to determine the quadrant of the return value.
menu:
  flux_0_x_ref:
    name: math.atan2
    parent: math
    identifier: math/atan2
weight: 101
---

<!------------------------------------------------------------------------------

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`math.atan2()` returns the artangent of `x/y`, using the signs
of the two to determine the quadrant of the return value.



##### Function type signature

```js
(x: float, y: float) => float
```

{{% caption %}}For more information, see [Function type signatures](/flux/v0.x/function-type-signatures/).{{% /caption %}}

## Parameters

### y
({{< req >}})
y-coordinate to use in the operation.



### x
({{< req >}})
x-corrdinate to use in the operation.