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Function std.math.rounding.nearbyint

Rounds x to the nearest integer value, using the current rounding mode.

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

Unlike the rint functions, nearbyint does not raise the FE_INEXACT exception.


import std.math.traits : isNaN;

writeln(nearbyint(0.4)); // 0
writeln(nearbyint(0.5)); // 0
writeln(nearbyint(0.6)); // 1
writeln(nearbyint(100.0)); // 100

writeln(nearbyint(real.infinity)); // real.infinity
writeln(nearbyint(-real.infinity)); // -real.infinity


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


Boost License 1.0.