Python 3.4.0 (v3.4.0:04f714765c13, Mar 16 2014, 19:25:23) [MSC v.1600 64 bit (AMD64)] on win32
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>>> a=5
>>> a
5
>>> a=7
>>> a
7
>>> b=36.24
>>> print (b)
36.24
>>> del a
>>> a
Traceback (most recent call last):
  File "<pyshell#7>", line 1, in <module>
    a
NameError: name 'a' is not defined
>>> myvar=7-4j
>>> myvar
(7-4j)
>>> yourvar=3+10j
>>> myvar+yourvar
(10+6j)
>>> str="Hello World"
>>> str
'Hello World'
>>> str[0]
'H'
>>> str[0:5]
'Hello'
>>> str[6:]
'World'
>>> str*4
'Hello WorldHello WorldHello WorldHello World'
>>> str + " What's up?"
"Hello World What's up?"
>>> 
