Python 2.5 for loop

Question

I am having a little trouble understanding this simple for loop code. I just need help explaining why it outputs the way it does.

y=0
for x in range(5):
 y=y+x
 print y
>>>
0
1
3
6
10
>>>

• soandos: 0+1+2+3+4, and parts of that...
• Mike X: Could you explain a little more please? How the range works? and why it outputs those integers? I know its simple code, just need a little help.
• slhck: Programming questions are off-topic for Super User. We have a site dedicated for programming called Stack Overflow, but you probably shouldn't post these simple "Here's some code, what does it do?" questions. You need to show us what you already found out, do a little research, et cetera.

Answer 1

range(5) gives you

[0,1,2,3,4]

in for loop you add up

y(0) = y(0) + x(0) >>> 0
y(1) = y(0) + x(1) >>> 1
y(3) = y(1) + x(2) >>> 3
y(6) = y(3) + x(3) >>> 6
y(10) = y(6) + x(4) >>> 10

• Mike X: Ok I understand the range now. Thanks.