# atan

> Returns the arctangent of a float value.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Mathematics](/engine/6000.7/script-reference/unity/mathematics.md)
* **Assembly:** UnityEngine.MathematicsModule

## atan(float)

Returns the arctangent of a float value.

```csharp
public static float atan(float x)
```

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                          | Description                              |
| ------------------------------------------------------------- | ---------------------------------------- |
| [float](https://learn.microsoft.com/dotnet/api/system.single) | The arctangent of the input, in radians. |

## atan(float2)

Returns the componentwise arctangent of a float2 vector.

```csharp
public static float2 atan(float2 x)
```

### Parameters

**** (\[float2]\(/engine/6000.7/script-reference/unity/mathematics/float2)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                                  | Description                                            |
| --------------------------------------------------------------------- | ------------------------------------------------------ |
| [float2](/engine/6000.7/script-reference/unity/mathematics/float2.md) | The componentwise arctangent of the input, in radians. |

## atan(float3)

Returns the componentwise arctangent of a float3 vector.

```csharp
public static float3 atan(float3 x)
```

### Parameters

**** (\[float3]\(/engine/6000.7/script-reference/unity/mathematics/float3)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                                  | Description                                            |
| --------------------------------------------------------------------- | ------------------------------------------------------ |
| [float3](/engine/6000.7/script-reference/unity/mathematics/float3.md) | The componentwise arctangent of the input, in radians. |

## atan(float4)

Returns the componentwise arctangent of a float4 vector.

```csharp
public static float4 atan(float4 x)
```

### Parameters

**** (\[float4]\(/engine/6000.7/script-reference/unity/mathematics/float4)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                                  | Description                                            |
| --------------------------------------------------------------------- | ------------------------------------------------------ |
| [float4](/engine/6000.7/script-reference/unity/mathematics/float4.md) | The componentwise arctangent of the input, in radians. |

## atan(double)

Returns the arctangent of a double value.

```csharp
public static double atan(double x)
```

### Parameters

**** (\[double]\(https\://learn.microsoft.com/dotnet/api/system.double)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                           | Description                              |
| -------------------------------------------------------------- | ---------------------------------------- |
| [double](https://learn.microsoft.com/dotnet/api/system.double) | The arctangent of the input, in radians. |

## atan(double2)

Returns the componentwise arctangent of a double2 vector.

```csharp
public static double2 atan(double2 x)
```

### Parameters

**** (\[double2]\(/engine/6000.7/script-reference/unity/mathematics/double2)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                                    | Description                                            |
| ----------------------------------------------------------------------- | ------------------------------------------------------ |
| [double2](/engine/6000.7/script-reference/unity/mathematics/double2.md) | The componentwise arctangent of the input, in radians. |

## atan(double3)

Returns the componentwise arctangent of a double3 vector.

```csharp
public static double3 atan(double3 x)
```

### Parameters

**** (\[double3]\(/engine/6000.7/script-reference/unity/mathematics/double3)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                                    | Description                                            |
| ----------------------------------------------------------------------- | ------------------------------------------------------ |
| [double3](/engine/6000.7/script-reference/unity/mathematics/double3.md) | The componentwise arctangent of the input, in radians. |

## atan(double4)

Returns the componentwise arctangent of a double4 vector.

```csharp
public static double4 atan(double4 x)
```

### Parameters

**** (\[double4]\(/engine/6000.7/script-reference/unity/mathematics/double4)): A tangent value, usually the ratio y/x on the unit circle.

### Returns

| Type                                                                    | Description                                            |
| ----------------------------------------------------------------------- | ------------------------------------------------------ |
| [double4](/engine/6000.7/script-reference/unity/mathematics/double4.md) | The componentwise arctangent of the input, in radians. |