python know what iteration you are in for loop code example

Example 1: how to use iteration in python

>>> a = ['foo', 'bar', 'baz']
>>> for i in a:
...     print(i)
...
foo
bar
baz

Example 2: how to use iteration in python

for i = 1 to 10
    <loop body>

Example 3: how to use iteration in python

n = 5
while n > 0:
    print n
    n = n-1
print 'Blastoff!'