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#1
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Mod operator
How come the Mod operator can return negative values? I've always
wondered why. |
#2
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Mod operator
well, what is there to wonder in that.
-3 Mod 2 will return -1 and that is perfect - manges -- Message posted from http://www.ExcelForum.com |
#3
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Mod operator
mangesh_yadav < wrote: well, what is there to wonder in that. -3 Mod 2 will return -1 and that is perfect - mangesh --- Message posted from http://www.ExcelForum.com/ |
#4
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Mod operator
Is that standard in all major programming languages?
mangesh_yadav < wrote: well, what is there to wonder in that. -3 Mod 2 will return -1 and that is perfect - mangesh --- Message posted from http://www.ExcelForum.com/ |
#6
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Mod operator
You seem to be getting into the universal definition paradigm. VBA defines
how the MOD operator works. Excel has a MOD function and it works differently - but its operation is defined in help. Mathematics may have another definition of how MOD works or rather what modulus/modulo is. You can't assume that a programming function will work the way your math teacher defined a math operation. You have to look at the documentation. as an illustrative point, one would think that addition would be pretty straightforward, but then you run into limitations in the IEEE implementation of a double . . . Each language that has a standard defines their own implementation. Those that don't have a recognized standard define it in their documentation. There is no universal standard (that I am aware of) that you seem to imply. http://support.microsoft.com/default...78&Product=xlw MOD Function and Mod Operator Return Different Values http://support.microsoft.com/default...71&Product=xlw XL2000: MOD Function and Mod Operator Return Different Values -- Regards, Tom Ogilvy "R Avery" wrote in message ... Is that standard in all major programming languages? mangesh_yadav < wrote: well, what is there to wonder in that. -3 Mod 2 will return -1 and that is perfect - mangesh --- Message posted from http://www.ExcelForum.com/ |
#7
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Mod operator
Ok. Point taken. Thanks, Tom.
Tom Ogilvy wrote: You seem to be getting into the universal definition paradigm. VBA defines how the MOD operator works. Excel has a MOD function and it works differently - but its operation is defined in help. Mathematics may have another definition of how MOD works or rather what modulus/modulo is. You can't assume that a programming function will work the way your math teacher defined a math operation. You have to look at the documentation. as an illustrative point, one would think that addition would be pretty straightforward, but then you run into limitations in the IEEE implementation of a double . . . Each language that has a standard defines their own implementation. Those that don't have a recognized standard define it in their documentation. There is no universal standard (that I am aware of) that you seem to imply. http://support.microsoft.com/default...78&Product=xlw MOD Function and Mod Operator Return Different Values http://support.microsoft.com/default...71&Product=xlw XL2000: MOD Function and Mod Operator Return Different Values |
#8
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Mod operator
Some implementations of MOD work differently when the arguments have different
signs. The worksheet function uses the definition that the modulus is always positive, i.e. =MOD(-10,3) yields -4 with a remainder of 2. OTOH, in VBA, definition that's used is probably what you division in grade school: -10 divided by +3 is -3 with a remainder of -1. On Wed, 01 Sep 2004 10:08:40 -0400, R Avery wrote: How come the Mod operator can return negative values? I've always wondered why. |
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