[Tutor] For Loop question

[Cédric Lucantis]

Le Thursday 26 June 2008 15:27:05 Danny Laya, vous avez écrit :
> Hi I'm learning FOR loop now, very easy too learn. But I get confused to
> understand this code : myList = [1,2,3,4]
> for index in range(len(myList)):
>     myList[index] += 1
> print myList
>
> And the response is:
> [2, 3, 4, 5]
>
> Can you explain me as a newbie, how that code works ??

The 'for in' construct loops over the items of a sequence, and the range 
function creates a sequence (list) of integers. It is described here:

http://docs.python.org/lib/built-in-funcs.html

so your code is equivalent to:

index = 0
while index < len(myList) :
	myList[index] += 1
	index += 1

--
Cédric Lucantis