Re: Round up prices
This WebDNA talk-list message is from 2000
It keeps the original formatting.
numero = 31319
interpreted = N
texte = OK that makes sense now. Round to nearest even integer for floating point values, nearest even multiple of 10 for 5, etc. That explains why there are rounding rules in Math::BigFloat that round to even, round to odd, round to zero, round to infinity, etc.There is always going to be a limitation of how this is going to be dealt with in code. I still think that rounding .5 down is the exception rather than the rule, and not how WebCat does it apparently.John PeacockChrister Olsson wrote: > > >Ah, it was the Swedes. > > It's always the Swedes (you'll soon see in S:t Petersburg ;-) > > > But tell me, how is 25 closer to 20 than 30? > >3*10 - 25 = 5 > >25 - 2*10 = 5??? > > > >Is there an additional digit 20 and something that causes it to > >attract the rounding? Do you mean round to the nearest power of 10? > > English is not my native language so honestly I have no idea if I mean the nearest power of 10. > > .5 is rounded to nearest even integer, like: 1.5 is rounded to 2, 3.5 is rounded to 4 and 6.5 is rounded to 6. Multiply with 10 and you get how 5, 15 and so on is rounded. > > ************************************************************* > Christer Olsson Stora Nygatan 21 Phone +46 40 791 50 > Ljusa Idéer AB S-211 37 Malmoe Fax +46 40 97 99 77 > Sweden http://www.ljusaideer.se > > ------------------------------------------------------------- > This message is sent to you because you are subscribed to > the mailing list
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OK that makes sense now. Round to nearest even integer for floating point values, nearest even multiple of 10 for 5, etc. That explains why there are rounding rules in Math::BigFloat that round to even, round to odd, round to zero, round to infinity, etc.There is always going to be a limitation of how this is going to be dealt with in code. I still think that rounding .5 down is the exception rather than the rule, and not how WebCat does it apparently.John PeacockChrister Olsson wrote: > > >Ah, it was the Swedes. > > It's always the Swedes (you'll soon see in S:t Petersburg ;-) > > > But tell me, how is 25 closer to 20 than 30? > >3*10 - 25 = 5 > >25 - 2*10 = 5??? > > > >Is there an additional digit 20 and something that causes it to > >attract the rounding? Do you mean round to the nearest power of 10? > > English is not my native language so honestly I have no idea if I mean the nearest power of 10. > > .5 is rounded to nearest even integer, like: 1.5 is rounded to 2, 3.5 is rounded to 4 and 6.5 is rounded to 6. Multiply with 10 and you get how 5, 15 and so on is rounded. > > ************************************************************* > Christer Olsson Stora Nygatan 21 Phone +46 40 791 50 > Ljusa Idéer AB S-211 37 Malmoe Fax +46 40 97 99 77 > Sweden http://www.ljusaideer.se > > ------------------------------------------------------------- > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to
John Peacock
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