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

Calculator

Graph

Graph LOG and LN

Logarithmic functions LOG and LN

Related functions

EXP function: natural exponential function.
LOG logarithm function to base 10.
List of Mathematical functions

External links

Natural logarithm on Wikipedia.