Boolean in Python

In Python, a boolean is a data type that represents one of two values: either True or False.

True and False are the two built-in boolean values in Python. They are case-sensitive, so you must write them with an uppercase initial letter: True and False.

Example:

x = True
y = False

print(x)
print(y)

Output:

True
False

Booleans are used to perform logical operations and make decisions in your code. They are fundamental to controlling the flow of a program through conditional statements like if, elif, and else. When two values are compared, the expression is evaluated and a boolean value is returned.

Example:

x = 10
y = 20

print(x > y)
print(x < y)
print(x == y)

if x > y:
    print("x is greater than y")
elif x == y:
    print("x is equal to y")
else:
    print("y is greater than x")

word1 = "hello"
word2 = "Hello"

result1 = word1 is word2
print("word1 is equal to word2  = ", result1)

result2 = word1 is not word2
print("word1 is not equal to word2  = ", result2)

Output:

False
True
False
y is greater than x
word1 is equal to word2  =  False
word1 is not equal to word2  =  True

In Python, the bool() function evaluates any value and return True or False.

print(bool("hello"))
print(bool(1 > 0))
print(bool(10))
print(bool("abc"))
print(bool(0))
print(bool(None))
print(bool(False))
print(bool(""))
print(bool([]))
print(bool({}))
print(bool(()))

Output:

True
True
True
True
False
False
False
False
False
False
False