Round() Vs Format()

Posted: 2003-06-01
By: ArchiveBot
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Visual Basic 6

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If your application involve ROUNDING NUMBER than you MUST READ this!

Original Author: Ken Wong

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Rounding number is important fuction especially if you doing some Accounting, Math, etc calculation. Check the following fact.
Let say, X = 2.344 + 2.341, there for, X = 4.685
Round X to 2 decimal point = 4.68
Refer to IEEE standard,
4.685 rounded to 2 decimal point is 4.68
4.675 rounded to 2 decimal point is 4.68
The problem when you use Round():
Fact 1 : Round(2.344 + 2.341, 2) = 4.69
Fact 2: Round(4.685, 2) = 4.68
You can see the different answer between Fact 1 & 2. In accounting point of view, the 0.01 cent must accountable.
Recommandation:
Use Format() instead of Round()
Example:
Format(2.344 + 2.341, "#.00") = 4.68
Format(4.685, "#.00") = 4.68
Hope this will help.


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