log10

Return 10-Based logarithm.

Declaration

Source position: math.pp line 305

function log10(

x: float

):float;

Description

Log10 returns the 10-base logarithm of X.

Errors

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

Example

Program Example21;

{ Program to demonstrate the log10 function. }

Uses math;

begin
  Writeln(Log10(10):8:4);
  Writeln(Log10(100):8:4);
  Writeln(Log10(1000):8:4);
  Writeln(Log10(1):8:4);
  Writeln(Log10(0.1):8:4);
  Writeln(Log10(0.01):8:4);
  Writeln(Log10(0.001):8:4);
end.

lazarus-ccr.sourceforge.net

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

log10

Declaration

Description

Errors

See also

Example