// https://projecteuler.net/problem=6 export const squareDifference = (num = 100) => { let sumOfSquares = (num * (num + 1) * (2 * num + 1)) / 6 let sums = (num * (num + 1)) / 2 return sums ** 2 - sumOfSquares // difference of square of the total sum and sum of squares }