$LGamma

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LGamma function

Note: Most Sirius $functions have been deprecated in favor of Object Oriented methods. There is currently no direct OO equivalent for the $LGamma function.

The $LGamma function returns the value:

loge 0 ux-1 e-u du

Syntax

%num = $LGamma(x)

Usage notes

  • If x is not in the range 0 < x < 4.2913 * 1073, an error message is printed and a 0 is returned.
  • See the SIRFUNC EXEC parameter for an explanation of when this high-performance, high-precision version of the IBM mathematical function from the Sirius Mods is used, as opposed to the version of the $function in the Model 204 FUND or FUNDLE CSECT.