$Log or $Log e: Difference between revisions

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{{DISPLAYTITLE:$Log or $Log_e}}
{{DISPLAYTITLE:$Log or $Log_e}}
<span class="pageSubtitle">Log function</span>
<span class="pageSubtitle">Log function</span>
<p class="warning">Most Sirius $functions have been deprecated in favor of Object Oriented
<p class="warn"><b>Note: </b>Most Sirius $functions have been deprecated in favor of Object Oriented
methods.
methods.
The OO equivalent for the
The OO equivalent for the

Revision as of 20:54, 18 July 2013

Log function

Note: 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.