Python Booleans

Python boolean data type is considered as the one among the built-in data types which are given by Python and will denote two values such as True or False. Read this article to learn more about Python Booleans.

What is Boolean Value?

In Python Programming, an expression will get a result either as True or False. Expression will be checked in Python and True or False will be produced.

Look at the example given below to know the comparison of two boolean values and how the expression is evaluated in Python.

print(8 > 7)
print(8== 7)
print(8< 7)

Hence, after execution of this condition in a statement, Pythin will either return with the True or False.

# Two numbers for comparison
number_1 = 10
number_2 = 5

# Checking the condition
if number_1 > number_2:
    message = f"{number_1} is greater than {number_2}."
else:
    message = f"{number_1} is not greater than {number_2}."

# Output
print("Number 1:", number_1)
print("Number 2:", number_2)
print(message)

Output

Number 1: 10
Number 2: 5
10 is greater than 5.

How to Evaluate Values and Variables in Python?

The bool () function will perform to evaluate any value and provide results either as True or False.

Example 1- to evaluate a string and number in Python

# Value to be checked
my_value = "Hello"

# Checking the type of the value
if type(my_value) == str:
    message = f"{my_value} is a string."
elif type(my_value) in (int, float):
    message = f"{my_value} is a number."
else:
    message = f"{my_value} is neither a string nor a number."

# Output
print("Value:", my_value)
print(message)

Output

Value: Hello
Hello is a string.

Example 2- to evaluate two variables in Python

# Two variables for evaluation
variable_1 = 10
variable_2 = 20

# Checking the condition
if variable_1 == variable_2:
    message = f"The variables are equal: {variable_1} == {variable_2}"
else:
    message = f"The variables are not equal: {variable_1} != {variable_2}"

# Output
print("Variable 1:", variable_1)
print("Variable 2:", variable_2)
print(message)

Output

Variable 1: 10
Variable 2: 20
The variables are not equal: 10 != 20

Most Values are True in Python

It is understood that any value can be evaluated to come as True if it has some content. Any string will have the result as True, where the empty strings are exceptional. In Python, other than zero, any number can get the result value as True. So, any list, set, or dictionary will get the result value as True, excluding the empty ones.

Example

bool("abc")
bool(123)
bool(["apple", "cherry", "banana"])

Output’

bool('abc'): True
bool(123): True
bool(['apple', 'cherry', 'banana']): True

Some Values are False in Python

The values that will get the result value as False are (), [], {}, “, the number 0, and the value None. The value False will be returned with a false value

Look at the example provided below that will return a False Value.

bool(False)
bool(None)
bool(0)
bool("")
bool(())
bool([])
bool({})

Output

bool(False): False
bool(None): False
bool(0): False
bool(''): False
bool(()): False
bool([]): False
bool({}): False

Check out the example provided below to know how the object that is made from a class with the v function will be returned with the 0 or false value.

class myclass():
  def __len__(self):
    return 0

myobj = myclass()
print(bool(myobj))

Output

false

Functions can return a Boolean in Python

It is possible to make a function that will return with a Boolean value.

def myFunction() :
  return True

print(myFunction())

Output

True

Example- to print ”Yes!” only if the function is returned with True value or else print ”NO”

def myFunction() :
  return True

if myFunction():
  print("YES!")
else:
  print("NO!")

Output

''YES''!

Conclusion

To conclude, boolean values in Python represent true or false. They are primarily used in conditions and decision-making statements. The bool() function is commonly used to assess the true values, whereas, True represents a truthy condition and False represents a falsy condition.

However, Boolean values are fundamental for controlling the flow of a program through if statements, loops, and other control structures, making Python code concise and expressive in handling logical operations.

Python Booleans- FAQs