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Returns the natural logarithm of a number.

```
Log (Number)
```

Double

Number: A numeric expression for which you want to calculate the natural logarithm.

The natural logarithm is the logarithm to the base e. The constant e has an value of approximately 2.71828182845904...

You can calculate logarithms to any base (n) 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)

```
Sub ExampleLogExp
Dim a As Double
Dim Const b1=12.345e12
Dim Const b2=1.345e34
a=Exp( Log(b1)+Log(b2) )
MsgBox "" & a & chr(13) & (b1*b2) ,0,"Multiplication by logarithm function"
End Sub
```