[next] [prev] [prev-tail] [tail] [up]

Ln

Declaration:
Function Ln (X : Real) : Real;
Description:

Ln returns the natural logarithm of the Real parameter X. X must be positive.

Errors:
An run-time error will occur when X is negative.
See also:
Exp (493), Power (547)

Listing: refex/ex37.pp

Program Example37;

{ Program to demonstrate the Ln function. }

begin
  Writeln (Ln(1));      { Prints 0 }
  Writeln (Ln(Exp(1))); { Prints 1 }
end.

[next] [prev] [prev-tail] [front] [up]