Math Round to always upper integer

I need 开发者_Python百科to find a division of two integers and round it to next upper integer

e.g x=7/y=5 = 2; here x and y always greater than 0

This is my current code

 int roundValue = x % y > 0? x / y + 1: x / y;

Is there any better way to do this?

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You could use Math.Ceiling... but that will require converting to/from double values.

Another alternative is to use Math.DivRem to do both parts at the same time.

public static int DivideRoundingUp(int x, int y)
{
    // TODO: Define behaviour for negative numbers
    int remainder;
    int quotient = Math.DivRem(x, y, out remainder);
    return remainder == 0 ? quotient : quotient + 1;
}

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Try (int)Math.Ceiling(((double)x) / y)

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All solutions looks too hard. For upper value of x/y, use this one

( x + y - 1 ) / y

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dunno what's better way or how to define a better way (if in terms of performance you have to run tests to see which will be faster), but here's my solution:

int roundValue = x / y + Convert.ToInt32(x%y>0);

p.s.

still have to deal somehow with neg. numbers... IMO this is the simplest.

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+0.5 will aways round to the higher.

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Use ceil() function. It gives the upper value.

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It's better to use MidpointRounding from Math.Round

In your case:

Math.Round(value, MidpointRounding.AwayFromZero);

see more: https://learn.microsoft.com/ru-ru/dotnet/api/system.math.round?view=net-6.0#system-math-round(system-double-system-midpointrounding)