On Wed, Aug 31, 2011 at 3:58 PM, Hugo Arts <hugo.yo...@gmail.com> wrote:
> On Wed, Aug 31, 2011 at 9:35 PM, Lisi <lisi.re...@gmail.com> wrote: > > ?? If either n or x or both were 0, and % were the same thing as *, the > > statement would be true, but from the context I don't think that % does > mean > > the same as *, because * appears very soon after in the same fragment of > > code. > > > > Lisi > > > > I'm sorry I am making such heavy weather of all this. Blame 2 things: > anno > > domini and an exaggerated (obsessive) need to understand language. > > % is the remainder operator: > > > http://docs.python.org/library/stdtypes.html#numeric-types-int-float-long-complex > > it is how much remains after you perform an integer division, e.g. 23 > % 5 == 3, since 20 / 5 == 4 and then you are left with 3. > > n % y == 0 if n is divisible by y. This is useful in factoring prime > numbers, and in the case of y == 2, for checking if the number n is > even. > > Hugo > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > Here is a little example that shows how using the 'mod' or 'modulus' operator can select only values that are divisible by 3. >>> for i in range(16): ... if not i % 3: ... print i ... 0 3 6 9 12 15 -- Joel Goldstick
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