Thursday, 30 October 2025

Python Coding challenge - Day 818| What is the output of the following Python Code?

Code Explanation:

1. Importing Required Modules
from functools import reduce
import operator
Explanation:
functools.reduce → a built-in Python function that repeatedly applies a given operation to the elements of a list (or iterable) to reduce it to a single value.

operator module → provides function equivalents for standard arithmetic and logical operations.

operator.mul(a, b) → same as a * b

operator.add(a, b) → same as a + b

2. Creating a List of Numbers
nums = [2, 3, 4]
Explanation:

Defines a list called nums containing three integers:

nums = [2, 3, 4]

3. Multiplying All the Numbers Together
mul = reduce(operator.mul, nums)

Explanation:

reduce() takes a function and a list, and applies the function cumulatively:

Step 1: 2 * 3 = 6
Step 2: 6 * 4 = 24

So after this line:

mul = 24

Equivalent plain Python expression:

mul = 2 * 3 * 4

4. Adding 5 to the Product
add = operator.add(mul, 5)

Explanation:

Uses operator.add() to add two numbers:

operator.add(24, 5) → 29

So now:

add = 29

Equivalent plain Python expression:

add = mul + 5

5. Performing Integer Division
print(add // 2)

Explanation:

// is the integer division operator — divides and drops the decimal part (i.e., floors the result).

Calculation:

29 // 2 = 14

(since 29 ÷ 2 = 14.5 → truncates to 14)

Final output:

14

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