Tracks
/
Elm
Elm
/
Exercises
/
Difference Of Squares
Difference Of Squares

Difference Of Squares

Easy

Instructions

Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.

The square of the sum of the first ten natural numbers is (1 + 2 + ... + 10)² = 55² = 3025.

The sum of the squares of the first ten natural numbers is 1² + 2² + ... + 10² = 385.

Hence the difference between the square of the sum of the first ten natural numbers and the sum of the squares of the first ten natural numbers is 3025 - 385 = 2640.

You are not expected to discover an efficient solution to this yourself from first principles; research is allowed, indeed, encouraged. Finding the best algorithm for the problem is a key skill in software engineering.

Last updated 13 October 2021
Edit via GitHub The link opens in a new window or tab
Elm Exercism

Ready to start Difference Of Squares?

Sign up to Exercism to learn and master Elm with 8 concepts, 54 exercises, and real human mentoring, all for free.