Steffen Glückselig wrote: >>>>1.0 + 3.0 + 4.6 > > 8.5999999999999996 > > Ehm, how could I get the intuitively 'correct' result of - say - 8.6? > ;-) You may find annex B of the python tutorial an interesting read: http://docs.python.org/tut/node16.html