Python Coding challenge - Day 827| What is the output of the following Python Code?

 

Code Explanation:

Importing the itertools module

import itertools

The itertools module provides functions that help create iterators for efficient looping, such as combinations, permutations, and product.

Here, it will be used to generate all possible ordered pairs of numbers.

Creating a list of numbers

nums = [1, 2, 3]

A simple list of integers is created: [1, 2, 3].

These will be used to form permutations (ordered pairs).

Generating all 2-element permutations

comb = itertools.permutations(nums, 2)

itertools.permutations(nums, 2) creates all possible ordered pairs (x, y) from the list, where each pair contains 2 distinct elements.

The generated pairs are:

(1, 2), (1, 3), (2, 1), (2, 3), (3, 1), (3, 2)

Calculating the sum of (x - y) for all pairs

total = sum(x - y for x, y in comb)

This is a generator expression that loops through each pair (x, y) and computes x - y.

The results are:

(1-2) = -1  

(1-3) = -2  

(2-1) = 1  

(2-3) = -1  

(3-1) = 2  

(3-2) = 1  

Adding them all together:

-1 + (-2) + 1 + (-1) + 2 + 1 = 0

So, total = 0.

Printing the absolute value

print(abs(total))

abs() returns the absolute value (removes the negative sign if any).

Since total = 0, the absolute value is also 0.

Final Output

0

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