This function calculates the gamma function value.
GAMMA(value)
For the argument, you can specify any real number whose value is either greater than 1 or equal to 1.
The value passed in the arguments should not be a negative integer or 0. If the specified number is a 0 or a negative integer, this function returns the #NUM! error.
If the specified number possesses invalid characters, this function returns the #VALUE! error.
Accepts numeric data. Returns numeric data.
GAMMA(7.5) gives the result 1871.254
GAMMA(1) gives the result 1
GAMMA(-1.23) gives the result #NUM!