Bruno Desthuilliers wrote: > Bryan Olson wrote: >> Hugh wrote: >>> Sorry, here's an example... >>> >>> 5+7=12 >>> >>> added without carrying, 5+7=2 >>> >>> i.e the result is always less than 10 >> Are you looking for bitwise exclusive or? In Python it's >> the '^' operator. For example: >> >> print 5 ^ 7 >> >> >>>> 10 ^ 21 > 31 > > Not really "less than 10"...
I had little idea what he meant by that. My guess was that no bit clear in an operand could be set in the result. XOR is also known as mod-2 addition. It's what you get if you add each bit independently, dropping carries, so I thought it might be what he was looking for. Unfortunately the bitwise mod-2 addition of 5 and 7 gives the same result as mod-10 addition. Oh well. -- --Bryan -- http://mail.python.org/mailman/listinfo/python-list
