LnXP1

Return natural logarithm of 1+X

Declaration

Source position: math.pp line 393

  function LnXP1(x: Float) : Float;

Description

Lnxp1 returns the natural logarithm of 1+X. The result is more precise for small values of x. x should be larger than -1.

Errors

If $x\leq -1$ then an EInvalidArgument exception will be raised.

See also

Name	Description
ldexp	Return (2 to the power p) times x
log10	Return 10-Based logarithm.
log2	Return 2-based logarithm
logn	Return N-based logarithm.

Example

Program Example20;
{ Program to demonstrate the lnxp1 function. }
Uses math;
begin
  writeln(lnxp1(0));
  writeln(lnxp1(0.5));
  writeln(lnxp1(1));
end.