GAMMALN

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

Syntax

GAMMALN(x)

X   is the value for which you want to calculate GAMMALN.

Remarks

• If x is nonnumeric, GAMMALN returns the #VALUE! error value.
• If x £ 0, GAMMALN returns the #NUM! error value.
• 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:

  

  where:

  

Examples

GAMMALN(4) equals 1.791759

EXP(GAMMALN(4)) equals 6 or (4 - 1)!