# log

> Returns the natural logarithm of a float value.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Mathematics](/engine/6000.5/script-reference/unity/mathematics.md)
* **Assembly:** UnityEngine.MathematicsModule

## log(float)

Returns the natural logarithm of a float value.

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

### Parameters

**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): Input value.

### Returns

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

## log(float2)

Returns the componentwise natural logarithm of a float2 vector.

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

### Parameters

**** (\[float2]\(/engine/6000.5/script-reference/unity/mathematics/float2)): Input value.

### Returns

| Type                                                                  | Description                                       |
| --------------------------------------------------------------------- | ------------------------------------------------- |
| [float2](/engine/6000.5/script-reference/unity/mathematics/float2.md) | The componentwise natural logarithm of the input. |

## log(float3)

Returns the componentwise natural logarithm of a float3 vector.

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

### Parameters

**** (\[float3]\(/engine/6000.5/script-reference/unity/mathematics/float3)): Input value.

### Returns

| Type                                                                  | Description                                       |
| --------------------------------------------------------------------- | ------------------------------------------------- |
| [float3](/engine/6000.5/script-reference/unity/mathematics/float3.md) | The componentwise natural logarithm of the input. |

## log(float4)

Returns the componentwise natural logarithm of a float4 vector.

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

### Parameters

**** (\[float4]\(/engine/6000.5/script-reference/unity/mathematics/float4)): Input value.

### Returns

| Type                                                                  | Description                                       |
| --------------------------------------------------------------------- | ------------------------------------------------- |
| [float4](/engine/6000.5/script-reference/unity/mathematics/float4.md) | The componentwise natural logarithm of the input. |

## log(double)

Returns the natural logarithm of a double value.

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

### Parameters

**** (\[double]\(https\://learn.microsoft.com/dotnet/api/system.double)): Input value.

### Returns

| Type                                                           | Description                         |
| -------------------------------------------------------------- | ----------------------------------- |
| [double](https://learn.microsoft.com/dotnet/api/system.double) | The natural logarithm of the input. |

## log(double2)

Returns the componentwise natural logarithm of a double2 vector.

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

### Parameters

**** (\[double2]\(/engine/6000.5/script-reference/unity/mathematics/double2)): Input value.

### Returns

| Type                                                                    | Description                                       |
| ----------------------------------------------------------------------- | ------------------------------------------------- |
| [double2](/engine/6000.5/script-reference/unity/mathematics/double2.md) | The componentwise natural logarithm of the input. |

## log(double3)

Returns the componentwise natural logarithm of a double3 vector.

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

### Parameters

**** (\[double3]\(/engine/6000.5/script-reference/unity/mathematics/double3)): Input value.

### Returns

| Type                                                                    | Description                                       |
| ----------------------------------------------------------------------- | ------------------------------------------------- |
| [double3](/engine/6000.5/script-reference/unity/mathematics/double3.md) | The componentwise natural logarithm of the input. |

## log(double4)

Returns the componentwise natural logarithm of a double4 vector.

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

### Parameters

**** (\[double4]\(/engine/6000.5/script-reference/unity/mathematics/double4)): Input value.

### Returns

| Type                                                                    | Description                                       |
| ----------------------------------------------------------------------- | ------------------------------------------------- |
| [double4](/engine/6000.5/script-reference/unity/mathematics/double4.md) | The componentwise natural logarithm of the input. |

## log(quaternion)

Returns the natural logarithm of a quaternion.

```csharp
public static quaternion log(quaternion q)
```

### Parameters

**** (\[quaternion]\(/engine/6000.5/script-reference/unity/mathematics/quaternion)): The quaternion.

### Returns

| Type                                                                          | Description                                    |
| ----------------------------------------------------------------------------- | ---------------------------------------------- |
| [quaternion](/engine/6000.5/script-reference/unity/mathematics/quaternion.md) | The natural logarithm of the input quaternion. |