> I'm trying to write a program they may involve > needing to divide 1 by another number. In the > program below when I use 4 for the diameter of > the bore, and 1 for the diameter of the rod, > and 60 for the PSI, the force should be 706.8 . > However the program keeps giving me 0 for "rodarea". > If I use a value other than 1 the program works > fine. am I missing something, this the 3rd program > I have wrote. [...] > PI = 3.14 > area = (bore**2/4)*PI > rodarea = (rod**2/4)*PI
Dividing two integers will give you an integer (truncated) result: >>> 1/2 0 Dividing an integer by a float (or vice-versa) will give you a float: >>> 1/2.0 0.5 >>> 1/float(2) 0.5 If you want '1/2' to give you 0.5 (throughout your script), you can do: >>> from __future__ import division >>> 1/2 0.5 >>> 1//2 0 Notice that '//' (with or without the from __future__ import) will give you the integer result. =Tony.Meyer _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
