Log Function

Returns a Double specifying the natural logarithm of a number. Syntax Log(number) The required numberargument is aDouble or any validnumeric expression greater than zero. Remarks The natural logarithm is the logarithm to the base e. Theconstant 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: Log n(x) = Log ( x ) / Log ( n ) The following example illustrates a custom Function that calculates base-10 logarithms:

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

Example

This example uses the Log function to return the natural logarithm of a number.

Dim MyAngle, MyLog
' Define angle in radians.
MyAngle = 1.3
' Calculate inverse hyperbolic sine.
MyLog = Log(MyAngle + Sqr(MyAngle * MyAngle + 1))