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.