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Function `std.math.exp2`

Calculates 2^x.


						
				real exp2
				(
				

				  real x
				

				) pure nothrow @nogc @trusted;

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

Example

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

Example

assert(feqrel(exp2(0.5L), SQRT2) >= real.mant_dig -1);
writeln(exp2(8.0L)); // 256.0
writeln(exp2(-9.0L)); // 1.0L / 512.0

Authors

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

License

Boost License 1.0.

API Documentation

Function std.math.exp2

Example

Example

Authors

License

Function `std.math.exp2`