2.0 KiB
2.0 KiB
title |
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Python Bool Function |
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