>>> for a in [aka,sks,ttd]:

...     print(a)

... 

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

NameError: name 'aka' is not defined

>>> for a ["aka", "sks", "add"]:

  File "<stdin>", line 1

    for a ["aka", "sks", "add"]:

                               ^

SyntaxError: invalid syntax

>>> 

>>> for a in["aka", "asr", "ddd"]:

...     print(a)

... 

aka

asr

ddd

>>> i = 0

>>> while i < 3:

...     i++

  File "<stdin>", line 2

    i++

      ^

SyntaxError: invalid syntax

 >>> i = 0

>>> while i < 3:

...     i=i+1

...     print(i)

... 

1

2

3

def sum(a,b):

...     return a+b

... 

>>> print(sum(3,4))

7

>>> print(sum(1,8,3))

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

TypeError: sum() takes 2 positional arguments but 3 were given

>>> print(sum(1,3))

4

>>>