In [1]:

    

var = 5


    

In [2]:

    

x=6


    

In [3]:

    

var + x


    

    
Out[3]:





11

In [4]:

    

type(x)


    

    
Out[4]:





int

In [5]:

    

a = 5.5


    

In [6]:

    

type(a)


    

    
Out[6]:





float

In [7]:

    

name = "Hrant"


    

In [8]:

    

type(name)


    

    
Out[8]:





str

In [9]:

    

surname = 'Davtyan'


    

In [10]:

    

type(surname)


    

    
Out[10]:





str

In [11]:

    

z = x + a


    

In [12]:

    

z


    

    
Out[12]:





11.5

In [13]:

    

name + surname


    

    
Out[13]:





'HrantDavtyan'

In [14]:

    

name + " " + surname


    

    
Out[14]:





'Hrant Davtyan'

In [15]:

    

x + name


    

    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-15-997d83eb27f0> in <module>()
----> 1 x + name

TypeError: unsupported operand type(s) for +: 'int' and 'str'

In [16]:

    

number_as_text = str(x)


    

In [17]:

    

number_as_text


    

    
Out[17]:





'6'

In [18]:

    

type(number_as_text)


    

    
Out[18]:





str

In [19]:

    

str(x) + name


    

    
Out[19]:





'6Hrant'

In [20]:

    

x*var


    

    
Out[20]:





30

In [21]:

    

x*name


    

    
Out[21]:





'HrantHrantHrantHrantHrantHrant'

In [23]:

    

2*(surname+" ")


    

    
Out[23]:





'Davtyan Davtyan '

In [27]:

    

student_list = ["Jack", "James", "John"]


    

In [29]:

    

type(student_list)


    

    
Out[29]:





list

In [32]:

    

print(student_list)


    

    




['Jack', 'James', 'John']

In [33]:

    

student_list.append("Jimmy")


    

In [34]:

    

print(student_list)


    

    




['Jack', 'James', 'John', 'Jimmy']

In [35]:

    

len(student_list)


    

    
Out[35]:





4

In [36]:

    

student_list[1]


    

    
Out[36]:





'James'

In [37]:

    

student_list[0]


    

    
Out[37]:





'Jack'

In [38]:

    

student_list[3]


    

    
Out[38]:





'Jimmy'

In [39]:

    

student_list[-1]


    

    
Out[39]:





'Jimmy'

In [40]:

    

student_list[0:1]


    

    
Out[40]:





['Jack']

In [41]:

    

student_list[0:2]


    

    
Out[41]:





['Jack', 'James']

In [42]:

    

student_list[0:3]


    

    
Out[42]:





['Jack', 'James', 'John']

In [43]:

    

mixed_list = [x,5,"Some text",student_list]


    

In [44]:

    

print(mixed_list)


    

    




[6, 5, 'Some text', ['Jack', 'James', 'John', 'Jimmy']]

In [45]:

    

mixed_list[-1]


    

    
Out[45]:





['Jack', 'James', 'John', 'Jimmy']

In [46]:

    

mixed_list[-1][-1]


    

    
Out[46]:





'Jimmy'

In [47]:

    

my_tuple = ("name", x, 5)


    

In [48]:

    

type(my_tuple)


    

    
Out[48]:





tuple

In [49]:

    

student_list[-1]


    

    
Out[49]:





'Jimmy'

In [50]:

    

student_list[-1] = "Ararat"


    

In [51]:

    

print(student_list)


    

    




['Jack', 'James', 'John', 'Ararat']

In [52]:

    

my_dictionary = {"name":"Hrant","surname":"Davtyan"}


    

In [53]:

    

type(my_dictionary)


    

    
Out[53]:





dict

In [54]:

    

print(my_dictionary)


    

    




{'surname': 'Davtyan', 'name': 'Hrant'}

In [55]:

    

my_dictionary["name"]


    

    
Out[55]:





'Hrant'

In [56]:

    

my_dictionary["surname"]


    

    
Out[56]:





'Davtyan'

In [ ]:

    

dictionary = {"age":["5","6","7"],"name":["A,""]}


    

In [57]:

    

print(x)


    

    




6

In [58]:

    

x==6


    

    
Out[58]:





True

In [59]:

    

x==7


    

    
Out[59]:





False

In [62]:

    

x=="6"


    

    
Out[62]:





False

In [63]:

    

if x==6:
    print "Succes!"


    

    




Succes!

In [64]:

    

if x==7:
    print "Succes!"


    

In [65]:

    

if x==7:
    print("It is 7")
else:
    print("It is not 7")


    

    




It is not 7

In [67]:

    

if x==7:
    print("It is 7")
elif x>7:
    print("It is higher than 7")
else:
    print("It is less than 7")


    

    




It is less than 7

In [72]:

    

x = input("Please, input some number ")
if x==7:
    print("It is 7")
elif x>7:
    print("It is higher than 7")
else:
    print("It is less than 7")


    

    




Please, input some number 56
It is higher than 7

In [71]:

    

print(7)


    

    




7

In [73]:

    

print(student_list)


    

    




['Jack', 'James', 'John', 'Ararat']

In [77]:

    

for student in student_list:
    print(student)


    

    




Jack
James
John
Ararat

In [76]:

    

print(i)


    

    




Ararat

In [78]:

    

range(5)


    

    
Out[78]:





[0, 1, 2, 3, 4]

In [79]:

    

range(10)


    

    
Out[79]:





[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

In [84]:

    

range(2,10,2)


    

    
Out[84]:





[2, 4, 6, 8]

In [90]:

    

for i in range(4):
    print(student_list[i])


    

    




Jack
James
John
Ararat

In [92]:

    

y=0
while 3<5:
    print("success")
    y = y+1


    

    




success
success
success
success
success

In [105]:

    

def my_sum(x,y):
    return x+y


    

In [106]:

    

print(my_sum(3,5))


    

    




8

In [107]:

    

f = my_sum(157,1267)


    

In [108]:

    

print(f)


    

    




1424

In [109]:

    

import numpy


    

In [110]:

    

numpy.sqrt(16)


    

    
Out[110]:





4.0

In [111]:

    

numpy.log(2.74)


    

    
Out[111]:





1.0079579203999789

In [112]:

    

student_list[1]


    

    
Out[112]:





'James'

In [113]:

    

name = "Hrant"


    

In [114]:

    

name[0]


    

    
Out[114]:





'H'

In [116]:

    

name[0:2]


    

    
Out[116]:





'Hr'

In [119]:

    

name[:2]


    

    
Out[119]:





'Hr'

In [120]:

    

name[2:]


    

    
Out[120]:





'ant'

In [121]:

    

my_name = "G" + name[1:]


    

In [122]:

    

print(my_name)


    

    




Grant

In [127]:

    

try:
    print(4/1)
except:
    print("ZeroDivisionError: integer division or modulo by zero")


    

    




4

In [125]:

    

4/0


    

    




---------------------------------------------------------------------------
ZeroDivisionError                         Traceback (most recent call last)
<ipython-input-125-6de94738d89d> in <module>()
----> 1 4/0

ZeroDivisionError: integer division or modulo by zero

In [134]:

    

from __future__ import division


    

In [135]:

    

6/4


    

    
Out[135]:





1.5

In [136]:

    

float(6)/float(4)


    

    
Out[136]:





1.5

In [137]:

    

type(6.0)


    

    
Out[137]:





float

In [138]:

    

6.0/4.0


    

    
Out[138]:





1.5

In [139]:

    

from numpy import log


    

In [140]:

    

import numpy as np


    

In [141]:

    

np.log(10)


    

    
Out[141]:





2.3025850929940459

In [142]:

    

import math


    

In [ ]: