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Lesson #6: Boolean

Python uses boolean logic to evaluate conditions and get True or False. The boolean values True and False are returned when an expression is compared or evaluated.

💡 Note: True and False both start with capital letters.

print(50 > 51)     # False
print(34 == 20)     # False
print(10 < 15)     # True

💡 Note: Comparison between two variables is done using the double equals operator “==”.

Print a message based on whether the condition is True or False:

num_1 = 1
num_2 = 2

if num_1 > num_2:
  print(“num_1 is greater than num_2”)
  print(“num_1 is not greater than num_2”)

The following table describes these Boolean comparators:

Boolean ComparatorExampleMeaning
==num_1 == num_2num_1 equal to num_2
!=num_1 == num_2num_1 not equal to num_2
>=num_1 >= num_2num_1 greater than or equal to num_2
<=num_1 <= num_2num_1 less than or equal to num_2
>num_1 > num_2num_1 greater than to num_2
<num_1 < num_2num_1 less than to num_2

Conditional expressions are not limited to comparing numbers. You can also use them to compare values such as strings:

print(c > c)     # False
print(a == a)     # True
print(a < b)     # True

In Python, strings are ordered lexicographically, which means they’re ordered as they would appear in a dictionary.