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.

Example

Program Example20;

{ Program to demonstrate the lnxp1 function. }

Uses math;

begin
  writeln(lnxp1(0));
  writeln(lnxp1(0.5));
  writeln(lnxp1(1));
end.

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

LnXP1

Declaration

Description

Errors

See also

Example