434,659 Members | 1,939 Online
Need help? Post your question and get tips & solutions from a community of 434,659 IT Pros & Developers. It's quick & easy.

# Rounding

 P: n/a How do you round numbers in .NET? I have numbers defined as Single and after some calculations I want to round the result to the nearest tenth so I can do comparison of results (the rfuzz problem). Does FORMAT round? -- ------------------------------------ Wayne Wengert wa***@wengert.org Jul 19 '05 #1
4 Replies

 P: n/a Wayne Wengert wrote: How do you round numbers in .NET? I have numbers defined as Single and after some calculations I want to round the result to the nearest tenth so I can do comparison of results (the rfuzz problem). Does FORMAT round? If you want to compare results, then I suggest that rather than rounding you just compare the difference between the expected results and the ones you've got. You can specify the number of digits when you format, but that'll use (I believe) bankers' rounding, which may or may not be what you want. -- Jon Skeet - http://www.pobox.com/~skeet/ If replying to the group, please do not mail me too Jul 19 '05 #2

 P: n/a Wayne Wengert wrote: How do you round numbers in .NET? I have numbers defined as Single and after some calculations I want to round the result to the nearest tenth so I can do comparison of results (the rfuzz problem). Does FORMAT round? For rounding down: System.Math.Floor(myNumber); For rounding up: System.Math.Ceiling(myNumber); For simple rounding (the kind you do in maths classes at school): System.Math.Round(myNumber); Obviously these all return int types, and dont effect the parameter variable. Peace. -- Phil Price Student at The University Of Hull http://www.philprice.net http://www.dcs.hull.ac.uk Jul 19 '05 #3

 P: n/a If you multiply the number by 10e10 before you round (using the Math.Round above, or just CInt(num), then divide by 10e10, this will give you 10 decimal places. Steven "Phil Price" wrote in message news:be*********@newsg4.svr.pol.co.uk... Wayne Wengert wrote: How do you round numbers in .NET? I have numbers defined as Single and after some calculations I want to round the result to the nearest tenth so I can do comparison of results (the rfuzz problem). Does FORMAT round? For rounding down: System.Math.Floor(myNumber); For rounding up: System.Math.Ceiling(myNumber); For simple rounding (the kind you do in maths classes at school): System.Math.Round(myNumber); Obviously these all return int types, and dont effect the parameter variable. Peace. -- Phil Price Student at The University Of Hull http://www.philprice.net http://www.dcs.hull.ac.uk Jul 19 '05 #4

 P: n/a Phil Price wrote: For simple rounding (the kind you do in maths classes at school): System.Math.Round(myNumber); No, that's *not* the kind of rounding most people do in maths classes at school. At least, it certainly isn't the kind of rounding *I* usually came across. It's bankers' rounding - halves round towards even, so Math.Round(1.5)=2, Math.Round(2.5)=2, Math.Round(3.5)=4 etc. -- Jon Skeet - http://www.pobox.com/~skeet/ If replying to the group, please do not mail me too Jul 19 '05 #5

### This discussion thread is closed

Replies have been disabled for this discussion.