w3resource

Python: bool() function

bool() function

The bool() function is used to convert a value to a Boolean.

Syntax:

class bool([x])
Python: Built-in function - bool function()

Version:

(Python 3.2.5)

If x is false or omitted, this returns False; otherwise it returns True. bool is also a class, which is a subclass of int. Class bool cannot be subclassed further. Its only instances are False and True.

Return value:

Boolean Values (True/False).

Example: Python bool() function

val = True
print("val = ", bool(val))
val = False 
print("val = ", bool(val))
val = 5
print("val = ", bool(val))
val = 0
print("val = ", bool(val))
val = bool()
print("val = ", bool(val))

Output:

val =  True
val =  False
val =  True
val =  False
val =  False

Check if a list is empty or not ?

l = []
if not l:
    print("List is empty.")
else:
    print("List is not empty.")
l = [1, 2, 3]
if not l:
    print("List is empty.")
else:
    print("List is not empty.")

Output:

List is empty.
List is not empty.

Python Code Editor:

Previous: bin()
Next: bytearray()

Test your Python skills with w3resource's quiz



Become a Patron!

Follow us on Facebook and Twitter for latest update.

It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.

https://198.211.115.131/python/built-in-function/bool.php