Conditions



In [1]:

    
x = 2
print x == 2 # prints out True
print x == 3 # prints out False
print x < 3  # prints out True









    



True
False
True



In [8]:









    Out[8]:





True



In [11]:

    
name = "John"
age = 23
if name == "John" and age == 23 :
    print "Your name is John, and you are also 23 years old."

if name == "John" or name == "Rick":
    print "Your name is either John or Rick."









    



Your name is John, and you are also 23 years old.
Your name is either John or Rick.



In [17]:

    
age=50
if age<0:
    print('age<0')
elif age <50:
    print('age<50')
else:
    print('age>=50')









    



age>=50



In [18]:

    
age = input("Age of the dog: ")
print
if age < 0:
	print "This can hardly be true!"
elif age == 1:
	print "about 14 human years"
elif age == 2:
	print "about 22 human years"
elif age > 2:
	human = 22 + (age -2)*5
	print "Human years: ", human

### 
raw_input('press Return>')









    



---------------------------------------------------------------------------
KeyboardInterrupt                         Traceback (most recent call last)
<ipython-input-18-3621194f2dae> in <module>()
----> 1 age = input("Age of the dog: ")
      2 print
      3 if age < 0:
      4         print "This can hardly be true!"
      5 elif age == 1:

/Library/Python/2.7/site-packages/IPython/kernel/zmq/ipkernel.pyc in <lambda>(prompt)
    362         if content.get('allow_stdin', False):
    363             raw_input = lambda prompt='': self._raw_input(prompt, ident, parent)
--> 364             input = lambda prompt='': eval(raw_input(prompt))
    365         else:
    366             raw_input = input = lambda prompt='' : self._no_raw_input()

/Library/Python/2.7/site-packages/IPython/kernel/zmq/ipkernel.pyc in <lambda>(prompt)
    361         # raw_input in the user namespace.
    362         if content.get('allow_stdin', False):
--> 363             raw_input = lambda prompt='': self._raw_input(prompt, ident, parent)
    364             input = lambda prompt='': eval(raw_input(prompt))
    365         else:

/Library/Python/2.7/site-packages/IPython/kernel/zmq/ipkernel.pyc in _raw_input(self, prompt, ident, parent)
    763             except KeyboardInterrupt:
    764                 # re-raise KeyboardInterrupt, to truncate traceback
--> 765                 raise KeyboardInterrupt
    766             else:
    767                 break

KeyboardInterrupt: 





    



Age of the dog: 2



In [25]:

    
a=3
b=2
max1 = 1 if (a == 1) else 0
print max



In [10]:









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-10-2951250487bf> in <module>()
----> 1 map(1,2)

TypeError: argument 2 to map() must support iteration



In [18]:

    
if name in ["John", "Rick"]:
    print "Your name is either John or Rick."









    



Your name is either John or Rick.



In [24]:

    
age = 6
if age in [x for x in range(10)]:
    print age



In [4]:

    
x = 2
if x == 2:
    print "x equals two!"
else:
    print "x does not equal to two."









    



x equals two!



In [5]:

    
x = [1,2,3]
y = [1,2,3]
print x == y # Prints out True
print x is y # Prints out False









    



True
False



In [6]:

    
print not False # Prints out True
print (not False) == (False) # Prints out False









    



True
False

Loops



In [25]:

    
primes = [2, 3, 5, 7]
for prime in primes:
    print prime



In [39]:

    
xs = [100,200,300,400]
xs2 = []
for x in xs:
    xs2.append(x+1)



In [41]:

    
for x in range(len(xs)):
    print xs[x]



In [50]:

    
range(6,-1,-1)









    Out[50]:





[6, 5, 4, 3, 2, 1, 0]



In [73]:

    
# Prints out the numbers 0,1,2,3,4
for xfaas in xrange(5): # or range(5)
    print xfaas

# Prints out 3,4,5
for x in xrange(3, 6): # or range(3, 6)
    print x

# Prints out 3,5,7
for x in xrange(3, 8, 2): # or range(3, 8, 2)
    print x



In [60]:

    
# Prints out 0,1,2,3,4

x=[]
count = 0
while count < 5:
    count += 1  # This is the same as count = count + 1
    x.append(count)



In [61]:

    
x









    Out[61]:





[1, 2, 3, 4, 5]



In [62]:

    
# Prints out 0,1,2,3,4

count = 0
while True:
    print count
    count += 1
    if count >= 5:
        break



In [63]:

    
# Prints out only odd numbers - 1,3,5,7,9
for x in xrange(10):
    # Check if x is even
    if x % 2 == 0:
        continue
    print x



In [64]:

    
phonebook = {
    "John" : 938477566,
    "Jack" : 938377264,
    "Jill" : 947662781
}



In [72]:

    
for x, y in phonebook.iteritems():
    print "Phone number of %s is %d" % (x, y)









    



Phone number of Jill is 947662781
Phone number of John is 938477566
Phone number of Jack is 938377264



In [70]:

    
for key in phonebook.iterkeys():
    print key









    



Jill
John
Jack



In [78]:

    
for x in range(1,10):
    for y in range(1,10):
        print(x * y)