| Description |
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. (2.72 raised to that number power).
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| Related commands |
| Exp |
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Gives the exponent of a number |
| Log10 |
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Gives the log to base 10 of a number |
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| Example code : Calculate the exponent of 2 and the natural log of the result |
var
float : Double;
begin
// Get the natural logarithm of 2
float := Ln(2);
// Show this value
WriteLn('Ln(2) = '+FloatToStr(float));
// Get the exponent of this value - reverses the Ln operation
float := Exp(float);
// Show this value
WriteLn('Exp(Ln(2)) = '+FloatToStr(float));
end;
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| Show full unit code |
Ln(2) = 0.693147180559945
Exp(Ln(2)) = 2
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