Python Coding challenge - Day 784| What is the output of the following Python Code?

 

Code Explanation:

Importing the reduce Function

from functools import reduce

reduce() is a function from Python’s functools module.

It reduces a sequence (like a list) to a single cumulative value by repeatedly applying a function (like addition or multiplication) to its elements.

Creating a List

nums = [2, 4, 6]

A list named nums is created containing the integers 2, 4, and 6.

This will be used to perform reduction operations.

Calculating the Product Using reduce()

prod = reduce(lambda x, y: x * y, nums)

The lambda function here is lambda x, y: x * y, meaning it multiplies two numbers.

reduce() starts with the first two elements, multiplies them, then multiplies the result with the next element:

Step 1: 2 * 4 = 8

Step 2: 8 * 6 = 48

So, prod = 48

Result so far:

prod = 48

Appending a New Element

nums.append(3)

Adds the number 3 to the end of the list.

Now nums = [2, 4, 6, 3]

Using reduce() Again (This Time with a Start Value)

s = reduce(lambda x, y: x + y, nums, 5)

This time, the lambda function adds two numbers: lambda x, y: x + y

The third argument 5 is the initial value (start value) for the reduction.

Step-by-step addition:

Start = 5

5 + 2 = 7

7 + 4 = 11

11 + 6 = 17

17 + 3 = 20

So, s = 20

Result so far:

s = 20

Printing the Results

print(prod, s)

Prints the two calculated values on the same line separated by a space.

Output will be:

48 20

Final Output

48 20

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