# IMLN

## Content

This function returns the natural logarithm of a complex number.

## Syntax

`IMLN(complexnum)`

## Arguments

[Required] The *complexnum* argument is a complex number for which to return the natural logarithm.

## Remarks

An error is returned if the *complexnum* argument is not in the form "x+yi" or "x+yj".

## Examples

`IMLN("2+5j")`