# LN

## Content

This function returns the natural logarithm of the specified number.

## Syntax

`LN(value)`

## Arguments

For the argument, specify a positive numeric value.

## Remarks

This function is the inverse of [EXP](/spreadjs/docs/v17/formulareference/FormulaFunctions/math-trig-functions/EXP), so LN(EXP(x)) is x.

## Data Types

Accepts numeric data. Returns numeric data.

## Examples

`LN(B3)`

`LN(R1C2)`

`LN(10)` gives the result 2.3025850930

`LN(exp(1))` gives the result 1