Python Coding challenge - Day 630| What is the output of the following Python Code?

 Code Explanation:

1. Importing the random Module

import random

What it does:

Imports Python’s built-in random module, which provides functions for generating random numbers.

2. Defining the rand_evens(n) Generator Function

def rand_evens(n):

What it does:

Defines a generator function named rand_evens that will yield n even random integers between 1 and 100.

3. Start of the While Loop

    while n:

What it does:

Loops as long as n is not zero (i.e., n > 0).

Purpose:

Ensures that exactly n even numbers will be generated.

4. Generating a Random Integer

        r = random.randint(1, 100)

What it does:

Generates a random integer r between 1 and 100, inclusive.

5. Checking if the Number is Even

        if r % 2 == 0:

What it does:

Checks if the random number r is even (i.e., divisible by 2).

6. Yielding the Even Number

            yield r

What it does:

If r is even, it yields (returns) the value to the caller (e.g. during iteration).

Why use yield:

Turns rand_evens into a generator that can lazily produce values on demand.

7. Decreasing the Counter

            n -= 1

What it does:

Decrements n by 1 after successfully yielding an even number.

Purpose:

Ensures exactly n even numbers are generated in total.

8. Printing the Number of Generated Even Numbers

print(len(list(rand_evens(3))))

Step-by-step:

rand_evens(3) returns a generator that will yield 3 even random numbers.

list(rand_evens(3)) converts the generator output to a list of 3 numbers.

len(...) calculates the length of the list, which will always be 3.

print(...) displays the number 3 on the console.

Expected Output

3

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