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Function `std.math.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.

Note

Not implemented for Microsoft C Runtime

Example

version (CRuntime_Microsoft) {}
else
{
    writeln(nearbyint(0.4)); // 0
    writeln(nearbyint(0.5)); // 0
    writeln(nearbyint(0.6)); // 1
    writeln(nearbyint(100.0)); // 100

    assert(isNaN(nearbyint(real.nan)));
    writeln(nearbyint(real.infinity)); // real.infinity
    writeln(nearbyint(-real.infinity)); // -real.infinity
}
}

/**********************************
* Rounds x to the nearest integer value, using the current rounding
* mode.
*
* If the return value is not equal to x, the FE_INEXACT
* exception is raised.
*
* <code class="lang-d"><span class="pln">nearbyint</span></code> performs the same operation, but does
* not set the FE_INEXACT exception.
*/
real rint(real x) @safe pure nothrow @nogc { pragma(inline, true); return rint(x);

Authors

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

License

Boost License 1.0.