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Function std.math.scalbn

Efficiently calculates x * 2n.

scalbn handles underflow and overflow in the same fashion as the basic arithmetic operators.

x scalb(x) ±0.0 ±0.0

Prototype

real scalbn(
  real x,
  int n
) nothrow @nogc @trusted;

Example

assert(scalbn(-real.infinity, 5) == -real.infinity);

Authors

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

License

Boost License 1.0.

Comments