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In [1]:

    
print("hello world")









    



hello world



In [2]:

    
1+2









    Out[2]:





3



In [3]:

    
2*4









    Out[3]:





8



In [4]:

    
5-6









    Out[4]:





-1



In [5]:

    
4-2









    Out[5]:





2



In [6]:

    
6/3









    Out[6]:





2.0



In [7]:

    
6//2









    Out[7]:





3



In [8]:

    
5/2









    Out[8]:





2.5



In [9]:

    
5//2









    Out[9]:





2



In [10]:

    
6%3









    Out[10]:





0



In [11]:

    
4**2









    Out[11]:





16



In [12]:

    
5//2.0









    Out[12]:





2.0



In [13]:

    
5.0/2









    Out[13]:





2.5



In [14]:

    
'this is a string'









    Out[14]:





'this is a string'



In [15]:

    
"this is also a string"









    Out[15]:





'this is also a string'



In [16]:

    
"'this is triple quoted string'"









    Out[16]:





"'this is triple quoted string'"



In [17]:

    
"'this
is''"









    



  File "<ipython-input-17-2ad36a174689>", line 1
    "'this
          ^
SyntaxError: EOL while scanning string literal



In [18]:

    
"""this
is"""









    Out[18]:





'this\nis'



In [19]:

    
"'this 
is"









    



  File "<ipython-input-19-bfec1a3a44d0>", line 1
    "'this
           ^
SyntaxError: EOL while scanning string literal



In [20]:

    
true









    



---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-20-74d9a83219ca> in <module>()
----> 1 true

NameError: name 'true' is not defined



In [21]:

    
True









    Out[21]:





True



In [22]:

    
False









    Out[22]:





False



In [24]:

    
None



In [25]:

    
'string' +'added'









    Out[25]:





'stringadded'



In [26]:

    
'1'+'1'









    Out[26]:





'11'



In [27]:

    
'1'+1









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-27-0b5599e2e487> in <module>()
----> 1 '1'+1

TypeError: Can't convert 'int' object to str implicitly



In [28]:

    
a=2



In [29]:

    
'a'*4









    Out[29]:





'aaaa'



In [30]:

    
'string'-'str'









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-30-6a3a405c8605> in <module>()
----> 1 'string'-'str'

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

h/w try to use all the math operators on different types of string/int/boolean/float



In [31]:

    
1+2j









    Out[31]:





(1+2j)

2+4j-5+6j



In [32]:

    
(2+4j)+(3+3j)









    Out[32]:





(5+7j)



In [33]:

    
2+4j-5+2j









    Out[33]:





(-3+6j)



In [34]:

    
conditionals









    



---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-34-54d51d86716a> in <module>()
----> 1 conditionals

NameError: name 'conditionals' is not defined

VARIABLES



In [ ]:

    
name_of _variable = 23



In [ ]:

    
'NAMING OF A VARIABLE''a-zA-Z_0-9'



In [ ]:

    
leapfrog_wifi=3 'for python:snake case all small undescore'



In [ ]:

    
LeapFrogWifi=3"camel case"



In [ ]:

    
leapFrogWifi=3'capital case'



In [35]:

    
start, end=0, 1



In [36]:

    
start









    Out[36]:





0



In [37]:

    
end









    Out[37]:





1

CONDITIONALS



In [38]:

    
if True:
    print("heyy")









    



heyy



In [44]:

    
if (start<0):
    print("this is negative")
elif start==0:
    print("it is  zero")
else:
    print("greater than zero")
print("hey there im out of block")









    



it is  zero
hey there im out of block



In [ ]:

    
if end=1:
    print("found end")



In [45]:

    
if start<0 or end>1:
    print("start is 0 end is 1")
else:
    print("neither")









    



neither



In [46]:

    
if start==0 and end==1:
    print("and")

and



In [47]:

    
2>1









    Out[47]:





True



In [48]:

    
start==1









    Out[48]:





False



In [49]:

    
a=2



In [50]:

    
1<a<3









    Out[50]:





True



In [51]:

    
1<=2









    Out[51]:





True



In [52]:

    
1!=2









    Out[52]:





True



In [53]:

    
1==2









    Out[53]:





False



In [54]:

    
True









    Out[54]:





True



In [55]:

    
not True









    Out[55]:





False



In [56]:

    
a= False



In [57]:

    
if not a:
    print("a is false")









    



a is false



In [58]:

    
if !a:
    print("false")









    



  File "<ipython-input-58-a90dac5174cf>", line 1
    if !a:
       ^
SyntaxError: invalid syntax



In [60]:

    
if a:
    print("true")
else:
    print("false")









    



false



In [61]:

    
a=''



In [62]:

    
if not a:
    print("string empty")
if a:
    print("string is nt empty")









    



string empty



In [63]:

    
not a









    Out[63]:





True

LOOPS



In [65]:

    
city= 'Kathmandu'



In [ ]:



In [66]:

    
for char in city:
    print(char)









    



K
a
t
h
m
a
n
d
u



In [67]:

    
for i in range(0,len(city)):
    print (city[i],i)









    



K 0
a 1
t 2
h 3
m 4
a 5
n 6
d 7
u 8



In [69]:

    
for i in range(0,9):
    print(city[i],i)









    



K 0
a 1
t 2
h 3
m 4
a 5
n 6
d 7
u 8



In [70]:

    
[1,2,3]









    Out[70]:





[1, 2, 3]



In [71]:

    
['chitwan','kathmandu','pokhara']









    Out[71]:





['chitwan', 'kathmandu', 'pokhara']

LISTS



In [ ]:



In [72]:

    
[1,'p',2.546]









    Out[72]:





[1, 'p', 2.546]



In [73]:

    
[2,3,4,[2,3,4]]









    Out[73]:





[2, 3, 4, [2, 3, 4]]



In [74]:

    
cities=['chitwan','pokhara','kathmandu']



In [75]:

    
for city in cities:
    print(city)









    



chitwan
pokhara
kathmandu



In [76]:

    
if'kathmandu' in cities:
    print("yes")

yes



In [77]:

    
'k'in 'kathmandu'









    Out[77]:





True



In [78]:

    
for char in 'kathmandu':
    if char=='k':
        print('true')









    



true



In [79]:

    
range(0,9)









    Out[79]:





range(0, 9)



In [80]:

    
for i in range (0,9):
    print(i)



In [81]:

    
for i in range(0,9):
    if i%2 == 0:
        print(i)



In [82]:

    
for i in range (0,9,2):
    print(i)



In [84]:

    
for i  in range (0,9,4):
    print(i)



In [85]:

    
for i in range (1,9):
    print(i)
    if i %5 == 0:
        break



In [86]:

    
for i in range (1,9):
    if i%5==0:
        break
    print (i)



In [88]:

    
for i in range (1,9):
    
    if i%5==0:
        print(i)
        continue



In [89]:

    
#it is a comment.



In [90]:

    
i=0
while True:
    if i==5:
        break
    print(i)
    i+=1



In [91]:

    
num= input ("enter a nummber")









    



enter a nummber2



In [92]:

    
num









    Out[92]:





'2'



In [93]:

    
int (num)









    Out[93]:





2



In [94]:

    
float(num)









    Out[94]:





2.0



In [95]:

    
num +2









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-95-aead9acb0cef> in <module>()
----> 1 num +2

TypeError: Can't convert 'int' object to str implicitly

BUILD A GUESSING GAME



In [96]:

    
from random import randint



In [99]:

    
randint(0,99)









    Out[99]:





37



In [ ]:

    
from random import randint
b= randint(1,99)
print("lets start the game!!!")
i=1
while i<4:
    a= input("enter a number between 1 to 100")
    c= int(a)
    if c<b:
        print("number is slightly less")
    elif c>b:
        print("number is greater")
    else:
        print("correct guess")
        print(b)
        break
    i+=1



In [ ]:

    
from random import randint
b= randint(1,99)
print("lets start the game!!!")
i=1
while i<4:
    a= input("enter a number between 1 to 100")
    c= int(a)
    if c==b:
        print("correct guess")
        print(b)
        break
    elif c<b:
        print("number is slightly less")
    else:
        print("number is greater")
    
    i+=1



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