Python bool()

test = 1

# returns boolean value of 1
print(test, 'is', bool(test))

# Output: 1 is True

bool() Syntax

The syntax of bool() is:

bool(argument)

bool() Parameter

The bool() method takes in a single parameter:

• argument - whose boolean value is returned

bool() Return Value

The bool() method returns:

• False - if argument is empty, False, 0 or None
• True - if argument is any number (besides 0), True or a string

Example 1: Python bool() with True Arguments

test = 254
# bool() with an integer number
print(test, 'is', bool(test))

test1 = 25.14
# bool() with a floating point number
print(test1, 'is', bool(test1))

test2 = 'Python is the best'
# bool() with a string
print(test2, 'is', bool(test2))

test3 = True
# bool() with True
print(test3, 'is', bool(test3))

Output

254 is True
25.14 is True
Python is the best is True
True is True

In the above example, we have used the bool() method with various arguments like integer, floating point numbers, and string.

Here, the method returns True values for arguments like 25, 25.14, 'Python is a String', and True.

Example 2: bool() with False Arguments

test = []
# bool() with an empty argument
print(test, 'is' ,bool(test))

test1 = 0
# bool() with zero
print(test1, 'is' ,bool(test1))

test2 = None
# bool() with none
print(test2, 'is' ,bool(test2))

test3 = False
# bool() with False
print(test3, 'is' ,bool(test3))

Output

[] is False
0 is False
None is False
False is False

In the above example, the bool() method returns False values for arguments like 0, None, False and [].

Recommended Readings:

• Python bin()
• Python ascii()