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Function std.math.exponential.log2

Calculates the base-2 logarithm of x: ⊂x

real log2 (
  real x
) pure nothrow @nogc @safe;

double log2 (
  double x
) pure nothrow @nogc @safe;

float log2 (
  float x
) pure nothrow @nogc @safe;

Special Values
x log2(x) divide by 0? invalid?
±0.0 -∞ yes no
<0.0 NAN no yes
+∞ +∞ no no


import std.math.operations : isClose;

assert(isClose(log2(1024.0L), 10));


Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger


Boost License 1.0.