ACC2000: How to Round a Number Up or Down by a Desired Increment

ID: Q209996

The information in this article applies to:

Microsoft Access 2000

Moderate: Requires basic macro, coding, and interoperability skills.

This article applies to a Microsoft Access database (.mdb) and a Microsoft Access project (.adp).

SUMMARY

This article shows you how to create a procedure that rounds a number up or down by a specified increment. For example, given the number 3.23, rounding to the nearest .05 results in the number 3.25. The procedure in this article accepts any positive rounding increment as a parameter. In addition to rounding numbers to the nearest fractional amount, you can also round to whole numbers, such as 1, 10, or 100.

Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs. If you have limited programming experience, you may want to contact a Microsoft Certified Solution Provider or the Microsoft fee-based consulting line at (800) 936-5200. For more information about Microsoft Certified Solution Providers, please see the following page on the World Wide Web:

http://www.microsoft.com/mcsp/

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http://www.microsoft.com/support/supportnet/overview/overview.asp

MORE INFORMATION

The following example creates a user-defined function called RoundToNearest, which accepts three parameters:

Parameter Value

dblNumber The numeric value you want to round

varRoundAmount The increment to which dblNumber will be rounded

varUp An optional argument: include to round up; omit to round down

For example:

RoundToNearest(3.33, 0.1, up) returns the value 3.4.

RoundToNearest(3.33, 0.1) returns the value 3.3.

Create a module and type the following line in the Declarations section if it is not already there:


Option Explicit

Create the following procedure:


Function RoundToNearest(dblNumber As Double, varRoundAmount As Double, _
   Optional varUp As Variant) As Double
         
   Dim dblTemp As Double
   Dim intTemp As Integer
   
   dblTemp = dblNumber / varRoundAmount
   intTemp = Int(dblTemp)
   
   If intTemp = dblTemp Then
      RoundToNearest = dblNumber
   Else
      If IsMissing(varUp) Then
         ' round down
         dblTemp = intTemp
      Else
         ' round up
         dblTemp = intTemp + 1
      End If
      RoundToNearest = dblTemp * varRoundAmount
   End If
End Function

To test this function, type each of the following lines in the Immediate window, and then press ENTER:
```
?RoundToNearest(1.36, 0.25, up) 
```
Note that the procedure returns 1.5.
```
?RoundToNearest(1.36, 0.25) 
```
Note that the procedure returns 1.25.
```
?RoundToNearest(1.36, 0.75, up) 
```
Note that the procedure returns 1.5, which is two increments of 0.75.

REFERENCES

Additional query words: factor cents dollars quarter dime nickel

Keywords : kbprg kbdta AccCon KbVBA
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbinfo