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Function std.math.exponential.exp2

Calculates 2x.

real exp2 (
  real x
) pure nothrow @nogc @trusted;

double exp2 (
  double x
) pure nothrow @nogc @safe;

float exp2 (
  float x
) pure nothrow @nogc @safe;

Special Values
x exp2(x)
+∞ +∞
-∞ +0.0


import std.math.traits : isIdentical;
import std.math.operations : feqrel;

assert(isIdentical(exp2(0.0), 1.0));
assert(exp2(2.0).feqrel(4.0) > 16);
assert(exp2(8.0).feqrel(256.0) > 16);


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


Boost License 1.0.