# LN function

## Description

Natural logarithm function. LN(x) returns the natural logarithm of the positive number x to base e (e=2.718281828). The argument x must be greater than 0. LN is the inverse function of EXP.

$$\ln(e^x) = x$$

The argument x can be a real number, a complex number, or a matrix. When it is a matrix, the function returns a matrix with the same dimensions and with the LN function applied to all elements.

## Example

LN(10) equals 2.3026