What is GAMMALN function in Excel? GAMMALN function is one of Statistical functions in Microsoft Excel that returns the natural logarithm of the gamma function, Γ(x). Syntax of GAMMALN function GAMMALN(x) The GAMMALN function syntax has the following arguments: X    Required. The value for which you want to calculate GAMMALN. GAMMALN formula explanation If x is nonnumeric, […]