Returns the natural logarithm of a number.

Syntax Log (Number) KeynumberAny valid numeric expression greater than 0.

The natural logarithm is the logarithm to the base e. The constant e is approximately 2.718282.

Calculate base-n logarithms for any number x by dividing the natural logarithm of x by the natural logarithm of *n* as follows:

Log*n*(x) = Log(x) / Log(*n*)

A custom Function to calculate base-10 logarithms:

Function Log10(X)

Log10 = Log(X) / Log(10)

End Function

*“Gold is the money of kings; silver is the money of gentlemen; barter is the money of peasants; but debt is the money of slaves” ~ Norm Franz *

**Related:**

Exp(*n*) - Return e (base of natural logs) raised to a power *n*.