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WorksheetFunction.GammaLn_Precise method (Excel)

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Returns the natural logarithm of the gamma function, Γ(x).

Syntax

expression.GammaLn_Precise (Arg1)

expression A variable that represents a WorksheetFunction object.

Parameters

Name Required/Optional Data type Description
Arg1 Required Double X - the value for which you want to calculate GammaLn.

Return value

Double

Remarks

If x is nonnumeric, the GammaLn_Precise method generates an error.

If x ≤ 0, the GammaLn_Precise method generates an error.

The number e raised to the GAMMALN(i) power, where i is an integer, returns the same result as (i - 1)!.

GammaLn is calculated as follows:

Screenshot of the Gamma Ln formula.   where   Screenshot of the formula for the Gamma X value.

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