Python Programming - Statments, Indentation, comments - code examples

Statements

>>> a

Traceback (most recent call last):

  File "<pyshell#0>", line 1, in <module>

    a

NameError: name 'a' is not defined

>>> a=5

>>> a

5

>>> a="string value"

>>> a

'string value'

>>> del a

>>> a

Traceback (most recent call last):

  File "<pyshell#6>", line 1, in <module>

    a

NameError: name 'a' is not defined

Statement continuation in next line

>>> a=10+12+35+\

   40+50+60+\

   23+19

>>> a

249

>>> a=(23+42+

   45+56

   +31)

>>> a

197

>>> a=10; b=15; c=25

>>> print("{}, {}, {}".format(c,a,b))

25, 10, 15

>>> colors=['silver',

'yellow',

'red']

>>> colors

['silver', 'yellow', 'red']

Indendation (used for blocks)

>>> for i in range(1,10):

print(i)

if i == 4:

break

1

2

3

4

Incorrect indentation will result in IndentationError

Comments

Single line comment

>>> #single line comment

Multiline comment

>>> '''

This is

multiline

comment

'''

'\nThis is\nmultiline\ncomment\n'

>>> """

This is

another

way to write

multi-line

comment

"""

'\nThis is\nanother\nway to write\nmulti-line\ncomment\n'