bool() is a built-in function in Python 3. This function returns a Boolean value, i.e. True or False. It takes one argument, x .
Arguments
It takes one argument, x . x is converted using the standard Truth Testing Procedure.
Return Value
If x is false or omitted, this returns False ; otherwise it returns True .
Comparison Operators
There are three Boolean Operators they are and , or , and not .
and
| expression | result |
|---|---|
true and true |
true |
true and false |
false |
false and true |
false |
false and false |
false |
or
| expression | result |
|---|---|
true or true |
true |
true or false |
true |
false or true |
true |
false or false |
false |
not
| expression | result |
|---|---|
not true |
false |
not false |
true |
Code Sample
print(bool(4 > 2)) # Returns True as 4 is greater than 2
print(bool(4 < 2)) # Returns False as 4 is not less than 2
print(bool(4 == 4)) # Returns True as 4 is equal to 4
print(bool(4 != 4)) # Returns False as 4 is equal to 4 so inequality doesn't holds
print(bool(4)) # Returns True as 4 is a non-zero value
print(bool(-4)) # Returns True as -4 is a non-zero value
print(bool(0)) # Returns False as it is a zero value
print(bool('dskl')) # Returns True as the string is a non-zero value
print(bool('')) # Returns False as the string is a zero value
print(bool([1, 2, 3])) # Returns True as the list is a non-zero value
print(bool((2,3,4))) # Returns True as tuple is a non-zero value
print(bool([])) # Returns False as list is empty and equal to 0 according to truth value testing