Log2
Return 2-based logarithm
Declaration
Source position: math.pp line 389
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.