# Natural Logarithms

How to solve natral logarithm problems: definition, example, and its solution.

## Definition

The natural logarithm is a logarithm

with base *e* (= 2.718... ).

It is written as 'ln'.

So log_{e} *c* = ln *c*.

## Example

ln 2 = 0.69

(given condition)

ln *e* = 1