---
title: "ln"
canonical: "https://support.appfire.com/space/PSJC/434831960/ln"
format: markdown
---
> Macro (aura-html)


## Description

> Macro (excerpt)
> 
> Returns the natural logarithm of a number. Natural logarithms are based on the constant e (2.71828182845904).

Returns the natural logarithm of a number. Natural logarithms are based on the constant e (2.71828182845904).

|  |  |  |  |
| --- | --- | --- | --- |
| **Syntax** | ln(number) | **Package** |  |
| **Alias** |  | **Pkg Usage** |  |

## Parameters

| Parameter name | Type | Required | Description |
| --- | --- | --- | --- |
| number | Number | Yes | The positive real number you want the natural logarithm for. |

## Return Type

**Number**

## Example

```javascript
number a = ln(86);
print("a= " + a);
number b = ln(exp(4));
print("b= " + b);
```

Prints:  
        a= 4.454347;  
        b= 4;

## See also

> Macro (contentbylabel)