RAD Studio VCL Reference
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System.Ln Function

Returns the natural log of a real expression.

Pascal
function Ln(const X: Extended): Extended;
C++
Extended Ln(const Extended X);

System

In Delphi code, Ln returns the natural logarithm (Ln(e) = 1) of the real-type expression X. 

 

Exp 

LnXP1

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