Python : IndentationError: expected an indented block

Initial learning of Python in IDLE, while executing While or For Loop examples like below, you will end up with "IndentationError: expected an indented block".

Example Error:

>>> z = ['a','b','c','d','e']

>>> i = 0

>>> while i < len(z):

... print(i, z[i])

  File "<stdin>", line 2

    print(i, z[i])

        ^

IndentationError: expected an indented block

>>> z = ['a','b','c','d','e']

>>> for i in range(0, len(z)):

... print(i, z[i])

  File "<stdin>", line 2

    print(i, z[i])

        ^

IndentationError: expected an indented block

Solved Example :

>>> z = ['a','b','c','d','e']

>>> i = 0

>>> while i < len(z):

...    print(i, z[i])

...    i += 1

...

0 a

1 b

2 c

3 d

4 e

>>> z = ['a','b','c','d','e']

>>> for i in range(0, len(z)):

...     print(i, z[i])

...

0 a

1 b

2 c

3 d

4 e

Solution :

 Should use Minimum 2 spaces or 4 Spaces on highlighted area in examples.