Hi,

I am new to C# 2005. I am reading Visual C# 2005 Express Edition and in Chapter 5, the author mentioned that for Rounding (double) correctly, you should use the Convert class. I tried and it DOES NOT work.

double dblValue = 2.5;
int intValueTotal1;
intValueTotal1 = Convert.ToInt32(dblValue);

It works for 2.6-2.9 but does not work for 2.5.
For Rounding 2.5, it should be 3 and NOT 2.

Any help? What should one use for Rounding? Thanks.

Regards,
NewBee

Hi,

I have found the answer. Apparently, c# Math.Round uses bankers' rounding .ie.
Math.Round(4.4) 'Returns 4.0.
Math.Round(4.5) 'Returns 4.0.
Math.Round(4.6) 'Returns 5.0.

To use Symmetric Arithmetic Rounding or Round-Half-Up (Symmetric Implementation), which is commonly used, for example in accounting.
4.4 returns 4.0
4.5 returns 5.0
4.6 returns 5.0

A few suggested methods :
(1) To use The Excel Round() spreadsheet function.
(2) The SQL Server Round() function can do symmetric arithmetic rounding.

Regards,
Newbee