Python for loop iterates through all elements of a list or similar data types.

>>> x = [1,3,5,7,9]
>>> for i in x: i

1
3
5
7
9

>>> for i in range(len(x)): i, x[i]

(0,1)
(1,3)
(2,5)
(3,7)
(4,9)

>>> for i in range(1,8):
... if(i == 5):
... break #break out if i equals 5
... print (i)
...

1
2
3
4

>>> for i in range(1,8):
... if(i == 5):
... break #break out if i equals 5
... print (i) #Error, no indent here
...

File "", line 4
print (i)
^
SyntaxError: invalid syntax