Booleans

Booleans are a separate data type. The origins of it lie in the work of George Boole, and has its own branch of algebra called Boolean Algebra.

Booleans have two values - True or False. That's it. End of lesson. Go home!

Ok, maybe not, let's show you how easy this is.



In [1]:

    
mybool_1 = True
print(mybool_1)









    



True



In [2]:

    
mybool_2 = False
print(mybool_2)









    



False

Not True / Not False?

What's not True?

What's not False?



In [3]:

    
not True









    Out[3]:





False



In [4]:

    
not False









    Out[4]:





True



In [5]:

    
a = True
b = True



In [6]:

    
print(a and b)









    



True



In [7]:

    
a = True
b = False
a or b









    Out[7]:





True



In [8]:

    
a = False
b = False
a or b









    Out[8]:





False



In [9]:

    
a and b









    Out[9]:





False



In [11]:

    
var1 = 10
var2 = 20
var3 = 30



In [12]:

    
print((var1+var2) == var3)









    



True



In [ ]:

    
print((var1+var3) == 40 and var2*2 ==40)



In [ ]:

    
print((var1-var2)==100 or var3-var1 == var2)



In [ ]:

    
print(not(var1 - 100)==var2 or var3-var1 == 900)

Predict the outcome of the cells below:



In [ ]:

    
True and True



In [ ]:

    
True or False



In [ ]:

    
not(True) or False



In [ ]:

    
not(not(False)) or not(True or False)



In [ ]:

    
True and 100 == 10**2



In [ ]:

    
"Hello" == "hello" and "Howdy" == "Howdy"



In [ ]:

    
not(not(1==2)) and (not(False) or (not(2==2)))