如何在 c # 中四舍五入

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Use Math.Ceiling: Math.Ceiling(value)

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最佳答案

Use Math.Ceiling()

double result = Math.Ceiling(1.02);

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If negative values are present, Math.Round has additional options (in .Net Core 3 or later).

I did a benchmark(.Net 5/release) though and Math.Ceiling() is faster and more efficient.

Math.Round( 6.88, MidpointRounding.ToPositiveInfinity) ==> 7   (~23 clock cycles)
Math.Round(-6.88, MidpointRounding.ToPositiveInfinity) ==> -6  (~23 clock cycles)


Math.Round( 6.88, MidpointRounding.AwayFromZero)       ==> 7   (~23 clock cycles)
Math.Round(-6.88, MidpointRounding.AwayFromZero)       ==> -7  (~23 clock cycles)


Math.Ceiling( 6.88)                                    ==> 7   (~1 clock cycles)
Math.Ceiling(-6.88)                                    ==> -6  (~1 clock cycles)