Python Coding Challenge - Question with Answer (ID -201225)

 

Explanation:

Import reduce

from functools import reduce

reduce() is not a built-in function.

It lives inside Python’s functools module.

So we import it to use it.

Create a List

nums = [5, 5, 10]

A list named nums is created.

It contains three integers: 5, 5, and 10.

We will use these values for addition.

 Apply reduce() for Sum

r = reduce(lambda a,b: a+b, nums)

reduce() repeatedly applies the lambda function.

The lambda adds two numbers at a time.

Steps internally:

5 + 5 = 10

10 + 10 = 20

So r becomes 20.

Initialize Loop Sum Variable

total = 0

Creates a variable total.

Starts it at 0.

It will store the sum calculated by loop.

Loop Through List

for n in nums:

    total += n

Loop picks each number from nums.

Adds it to total one by one.

Calculation:

total = 0 + 5 = 5

total = 5 + 5 = 10

total = 10 + 10 = 20

Print Results

print(r, total)

Prints both results on one line.

Output becomes:

20 20

Shows reduce and loop give the same answer.

Final Output

20 20

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