Bool() in Python

September 8, 2023

Bool

Bool() is an built-in function in python. It returns the boolean value of a speciified object i.e is True or False using standard truth testing procedure. Booleans are essential for making decisions in your Python programs, as they are often used in conditional statements (e.g., if, elif, else) to control the flow of your code based on logical conditions.

Bool :

It generally takes one value as parameter.
If no values passed it will return default value which is False.
If value passed is true it will True else False.
In some of cases it will always return False
- If None is passed.
- If an empty list , set or any sequence is passed .
- If zero is passed .
- If and function inside bool function returns zero i.e len() or count().
Syntax: bool(x)
Example: x = bool(1) #return the boolean value of 1

Example :

Run

# Python program 
# built-in method bool()
# Returns True as x is True
x = True
print(bool(x))
# Returns False as x is False
x = False
print(bool(x))
# Returns False as x is not equal to y
x = 4
y = 14
print(bool(x==y))
# Returns False as x is None
x = None
print(bool(x))
# Returns False as x is an empty sequence
x = []
print(bool(x))
# Returns False as x is an empty mapping
x = {}
print(bool(x))
# Returns False as x is 0
x = 0.0
print(bool(x))
# Returns True as x is a non empty string
x = 'Prepinsta'
print(bool(x)) 
#Returns True as length of x > 1
x=(1,2)
print(bool(len(x)))

Output:

True
False
False
False
False
False
False
True
True

Iterator Data-Types in Python

Sequence Data Types in Python

Blocks and Statement in Python

Indentation in Python

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