Python Coding challenge - Day 1293| What is the output of the following Python Code?

 

Code Explanation:

1. Importing reduce()

from functools import reduce

- The functools module provides higher-order functions and utilities.

- reduce() applies a function cumulatively to the items of an iterable.

- It combines multiple values into a single final result.

2. Creating a List

x = [2, 3, 4]

- Creates a list named x containing three integers: 2, 3, and 4.

- These values will be processed sequentially by reduce().

3. Using reduce() with a Lambda Function

r = reduce(lambda a, b: a - b, x)

- lambda a, b: a - b creates an anonymous function that subtracts b from a.

- reduce() starts with the first two list elements and applies the lambda function.

- The result is then combined with the next element.

Step-by-step calculation:

1. First operation: 2 - 3 = -1

2. Second operation: -1 - 4 = -5

- The final result, -5, is stored in variable r.

4. Printing the Result

print(r)

- The print() function displays the value stored in r.

- Since r contains -5, Python prints that value.

Final Output

-5

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