For floating point numbers, generally the data is stored as a number (mantissa and exponent) which is magnitude only, and a separate sign bit (ie 1 for negative and 0 for positive).
Therefore, if the mantissa is 0 and the sign bit is 1, you have negative zero. Which doesn't make any sense to people who are familiar with the idea of zero, but makes perfect sense to a computer which is only aware of a string of bits. --Ben Andy Ousterhout wrote: > Can someone explain the concept of + or - zero? > > Andy > > -----Original Message----- > From: Ryan Duckworth [mailto:[EMAIL PROTECTED] > Sent: Wednesday, January 05, 2005 2:19 PM > To: CF-Talk > Subject: RE: CF Allows Negative Zero? > > > This function will solve your problem: JavaCast('float',variableName) > > > Ryan Duckworth > Macromedia ColdFusion Certified Professional > > Uhlig Communications > 10983 Granada Lane > Overland Park, KS 66211 > (913) 754-4272 > > -----Original Message----- > From: Mark Drew [mailto:[EMAIL PROTECTED] > Sent: Wednesday, January 05, 2005 11:12 AM > To: CF-Talk > Subject: Re: CF Allows Negative Zero? > > Can you owe nothing? how about if I give you nothing is that +0? > > hmmm.. abstract > > > On Wed, 5 Jan 2005 10:44:40 -0600, Dawson, Michael <[EMAIL PROTECTED]> > wrote: > >>If you enter a negative zero (-0), CF keeps it as is and does not > > strip > >>the negative sign. >> >>I would assume that is because CF may think this is a string, however, >>it passes the IsNumeric() function. >> >>Should I just use the val() in my setter when I expect a numeric value >>to be passed? >> >>Thanks >>M!ke >> >> > > > > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:189456 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
