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Function core.math.rint
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.
nearbyint performs
the same operation, but does not set the FE_INEXACT exception.
Prototype
real rint( real x ) pure nothrow @nogc @safe;
Authors
Walter Bright, Don Clugston