$Log or $Log e: Difference between revisions
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Revision as of 20:07, 10 January 2012
Log function
Most Sirius $functions have been deprecated in favor of Object Oriented methods. The OO equivalent for the $Log function is the LogE function.
The $Log function (or its alias, $Log_e) returns the natural logarithm (the logarithm base e) of the number x.
Syntax
%num = $Log(x)
%num = $Log_e(x)
If x is not greater than 0, 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.