[Tutor] functions and iterations

[Alan Gauld]

On 13/11/12 03:56, Rufino Beniga wrote:
> def IterateLogistic(x,r,n):
>      for i in xrange(n):
>          x = r*(1-x)
>          if i = n:
>              print x
>


DogWalker has answered your basic question.

But you don't really need the test at all.
Just print x after the loop finishes:

def IterateLogistic(x,r,n):
       for i in xrange(n):
           x = r*(1-x)
       print x


But printing inside a function is usually not the best thing to do.
It's generally better practice to return the value and then print
the result externally:

def IterateLogistic(x,r,n):
       for i in xrange(n):
           x = r*(1-x)
       return x

print IterateLogistic(5,2,4)

It makes your function much more reusable. You can print the result or 
store it in a variable for later, or even use it directly in a bigger 
more complex expression.

HTH
-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/