Log Function (BASIC)

Returns the natural logarithm of a number.

Syntax:

Log (Number)

Return value:

Double

Parameters:

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:

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

Error codes:

5 Invalid procedure call

Example:

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