Question

How would I round to the nearest 5000 in vb.net. Can’t use math.round cause it gives error. I’m looking for something like mround() in microsoft exel.

  Math.round(43333 * 34, 5000)

Answer 1

Try

Math.Round(43000 / 5000) * 5000

As in:

For Each x In New Single() {2499, 2501, 7000, 21000, 43000, 99000}
    Console.WriteLine(String.Format( _
            "Rounding {0,7:N0} to the nearest 5,000: {1,7:N0}", _
            x, _
            Math.Round(x / 5000) * 5000) _
        )
Next

Console.ReadKey(True)

Outputs:

Rounding   2,499 to the nearest 5,000:       0
Rounding   2,501 to the nearest 5,000:   5,000
Rounding   7,000 to the nearest 5,000:   5,000
Rounding  21,000 to the nearest 5,000:  20,000
Rounding  43,000 to the nearest 5,000:  45,000
Rounding  99,000 to the nearest 5,000: 100,000

I’ll add that the default rounding behavior for Math.Round is MidpointRounding.ToEven which the documentation describes as “When a number is halfway between two others, it is rounded toward the nearest even number.” This means that 0.5 may be rounded to 0 or 1 depending on the circumstances (which is the desired behavior when dealing with statistics). To change this behavior, you can pass MidpointRounding.AwayFromZero as the second parameter, which will behave as you were taught in school (0.5 always rounds to 1, -0.5 always rounds to -1).