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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.