# Natural Logarithm

The natural logarithm is the logarithm having base *e*.

Natural logarithm is a high school-level concept that would be first encountered in a pre-calculus course covering exponents and logarithms. It is listed in the California State Standards for Algebra II.

### Prerequisites

Exponential Function: | The exponential function is the function consisting of the base of the natural logarithm e taken to the power of a given variable. |

Logarithm: | The logarithm is the power to which a number (called the base) must be raised to produce a given number. For example, the logarithm of 100 with respect to the base 10 is 2. |

Power: | In arithmetic, a power is an exponent to which a given quantity is raised. |

e: |
The mathematical constant denoted e is the base of the natural logarithm which has value of approximately 2.718. |