# Manuals/calci/GAMMALN

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**GAMMALN(x)**

- is the number.
- GAMMALN(), returns the natural logarithm of the Gamma Function.

## Description

- This function gives the natural logarithm of the absolute value of the Gamma Function.
- The functions Digamma and Trigamma are the first and second derivatives of the logarithm of the Gamma Function.
- This is often called the Polygamma function.
- Gamma, Lgamma, Digamma and Trigamma functions are internal generic primitive functions.
- Normally the number , where is an integer, is same as .

- ,

where

it is for all complex numbers except the negative integers and zero.

- This function will give the result as error when

is non-numeric and .

## Examples

- GAMMALN(6) = 4.787491744416229
- GAMMALN(42) = 114.03421178146174
- GAMMALN(1) = 0.00018319639111644828(calci)
- GAMMALN(-10) = #N/A (X <= 0)

## Related Videos

## See Also

## References