logn

Return N-based logarithm.

Declaration

Source position: math.pp line 307

function logn(

n: float;

x: float

):float;

Description

Logn returns the n-base logarithm of X.

Errors

If x is less than or equal to 0 an 'invalid fpu operation' error will occur.

Example

Program Example23;

{ Program to demonstrate the logn function. }

Uses math;

begin
  Writeln(Logn(3,4):8:4);
  Writeln(Logn(2,4):8:4);
  Writeln(Logn(6,9):8:4);
  Writeln(Logn(exp(1),exp(1)):8:4);
  Writeln(Logn(0.5,1):8:4);
  Writeln(Logn(0.25,3):8:4);
  Writeln(Logn(0.125,5):8:4);
end.

lazarus-ccr.sourceforge.net

ldexp		Return (2 to the power p) times x
lnxp1		Return natural logarithm of 1+X
log10		Return 10-Based logarithm.
log2		Return 2-based logarithm

logn

Declaration

Description

Errors

See also

Example