System.BuiltInLn

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Object Pascal

function BuiltInLn(X: Real): Extended; overload;
function BuiltInLn(X: Real): Double; overload;
function BuiltInLn(X: Real): Single; overload;

Properties

Type Visibility Source Unit Parent
function public System.pas System System

Description

Calculates the natural logarithm of a real expression.

BuiltInLn returns the the natural logarithm ( Ln(e)=1 ) of a real-type expression <X>.

Compiler Support

The following table shows which Object Pascal compilers support this function:

DCC32 DCC64 DCCOSX DCCAARM DCCIOSARM DCCIOSARM64 DCCIOS32
YesC++11Feature.png
YesC++11Feature.png

See Also