# Log Function

Returns the natural logarithm of a number.

Log(number)

The number argument can be any valid numeric expression greater than 0.

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

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

Logn(x) = Log(x) / Log(n)

The following example illustrates a custom Function that calculates base-10 logarithms:

Function Log10(X) Log10 = Log(X) / Log(10) End Function

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