Python Coding challenge - Day 1154| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Importing reduce

from functools import reduce

✅ Explanation:

reduce is imported from Python’s functools module.

reduce() repeatedly applies a function to iterable elements.

🔹 2. Creating List

a = [1,2,3,4]

✅ Explanation:

A list a is created with elements:

[1, 2, 3, 4]

🔹 3. Using reduce()

result = reduce(lambda x,y: x*y, a)

✅ Explanation:

reduce() takes:

A function

An iterable

🔹 4. Lambda Function

lambda x,y: x*y

✅ Explanation:

Anonymous function

Takes two values:

x, y

Returns:

x * y

🔹 5. How reduce() Works Internally

reduce() processes elements step-by-step.

🔍 Step 1

First two elements:

1 * 2 = 2

Now result becomes:

2

🔍 Step 2

Previous result with next element:

2 * 3 = 6

🔍 Step 3

Again with next element:

6 * 4 = 24

🔹 6. Final Result Stored

result = 24

🔹 7. Printing Result

print(result)

✅ Output:

24

🎯 Final Output

24

Book: 100 Python Programs for Beginner with explanation