Tuesday 11 June 2024

Python Coding challenge - Day 225 | What is the output of the following Python Code?

 

Let's break down the given code step by step:

a = 0

a = not not a

print(a)

Initialization: a = 0

Here, a is assigned the value 0, which in Python is considered False when used in a boolean context.

Double Negation: a = not not a

First Negation: not a

not is a logical operator that inverts the boolean value of its operand.
Since a is 0 (which is False in a boolean context), not a evaluates to True.
Second Negation: not (not a)

Now, we apply the not operator again to the result of the first negation.
not True evaluates to False.
So, a = not not a effectively assigns False to a.

Print the Result: print(a)

The value of a is now False, so the print(a) statement will output: False 
Summary
In this code:

a starts with the value 0.
Applying not not to a converts it to a boolean and then applies double negation.
Since 0 is False, not not a evaluates to False.
Therefore, print(a) outputs False.

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