# LN

Computes the natural logarithm $$ln(x)$$ where $$x$$ is the given input.

## Syntax

```
LN(X)
```

## Arguments

#### X

Type: `numeric`

A numeric value.

## Returns

Type: `double`

The natural logarithm of `X`.

Note that if $$x \leq 0$$, then the function returns a null value.

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## Examples

| X | Output |
| --- | --- |
| 1 | 0.0 |
| 0 | `null` |
| 2 | 0.6931471805599453 |
| 0.5 | -0.6931471805599453 |
| 4 \* 5 | 2.995732273553991 |