Booleans

Why is the purpose of booleans? In programming you often need to know if an expression is True or False. A boolean is a data type can can only have one of two values True and False. Creating booleans is pretty straight forward as demonstrated below.

Code

# Creates 2 boolean variables
bool1 = True
bool2 = False

# Print the boolean variables
print(bool1)
print(bool2)

Output

True
False

Comparisons

When using comparison operators such as ==, <=, and >, a boolean value will be returned based on the evaluation of the statement.

Code

print(20 > 3)
print(20 == 3)
print(20 < 3)

Output

True
False
False

If statements & booleans

If statment conditions evaluate if a boolean value or expression is True of False. If a True value is returned, the if block is evaluated; however, if the value is False and an else block exists, then the else block is evaluated.

Example:

Code

# Creates 2 numberic variables 
a = 100
b = 17

# Conditional Statement
if b > a:
    print("b is greater than a")
else:
    print("b is not gretaer than a")

Output

b is not gretaer than a