Boolean Operators

Boolean operators evaluate whether a variable or expression is True or False. These Boolean values are case sensitive so true or TRUE will produce an error. We can compare two Booleans by using and or or operators. The or operator results in True if either Boolean is True.

a = True
b = False
a or b

True

The and operator results in True only if both Booleans are True:

a and b

False

What happens if we have empty string variable or zero? Let’s check and see if they are True or False:

text = "I am telling the truth"
number = 1
print(bool(text))
print(bool(number))

True
True

notext =""
zero = 0
print(bool(notext))
print(bool(zero))

False
False

Any number other than 0 and 0.0 is always True.

We can test the equivalance of two expression by using is keyword, too. The difference between == and is , equal to compares the values of the variables, not the objects themselves.

list1 = [1,2,3]
list2 = [1,2,3]
list1 is list2

False

list1 = [1,2,3]
list2 = [1,2,3]
list1 == list2

True

Next topic : Order of Operations