x = y^3

Log Function

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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:

Logn(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

Exp Function

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Returns a Double specifying e (the base of natural logarithms) raised to a power.

Syntax

Exp(number)

The required numberargument is aDouble or any validnumeric expression.

Remarks

If the value of number exceeds 709.782712893, an error occurs. Theconstant e is approximately 2.718282.

Note The Exp function complements the action of the Log function and is sometimes referred to as the antilogarithm.