Log2¶

Return 2-based logarithm.

Declaration¶

Source position: math.pp line 686

function Log2(x: Float) : Float;

Description¶

Log2 returns the 2-base logarithm of X.

Errors¶

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

See also¶

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

Example¶

Program Example22;

{ Program to demonstrate the log2 function. }

Uses math;

begin
  Writeln(Log2(2):8:4);
  Writeln(Log2(4):8:4);
  Writeln(Log2(8):8:4);
  Writeln(Log2(1):8:4);
  Writeln(Log2(0.5):8:4);
  Writeln(Log2(0.25):8:4);
  Writeln(Log2(0.125):8:4);
end.