Ln

function Ln(Number Extended):Extended;

The Ln function takes an integer or floating point Number and gives the natural logarithm of that number. This is only used for mathematical processing.

Ln has the opposite effect to Exp - the exponent of a number.

Example:

Base Syntax

 var
    float,number : float;
 
 begin
 
   number := 2.14;
   float := Ln(number);
   ShowMessage('Ln('+FloatToStr(number)+') = '+FloatToStr(float));
 
   float := Exp(float);
   ShowMessage('Exp(Ln('+FloatToStr(float)+')) = '+FloatToStr(float));
 end;

TRObject Syntax

 var
    float,number : float;
 
 {
 
   number = 2.14;
   float = Ln(number);
   ShowMessage('Ln('+FloatToStr(number)+') = '+FloatToStr(float));
 
   float = Exp(float);
   ShowMessage('Exp(Ln('+FloatToStr(float)+')) = '+FloatToStr(float));
 }

Output:

Ln(2,14) = 0,76080582903376
Exp(Ln(2,14)) = 2,14