Intermediate Exercism • typescript

Difference Of Squares

Challenge Overview

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

Source: Exercism typescript/difference-of-squares

💡 View Solution

export class Squares {
  public readonly squareOfSum: number;
  public readonly sumOfSquares: number;
  public readonly difference: number;
  constructor(count: number) {
    this.squareOfSum = Math.pow((count * (count + 1)) / 2, 2);
    this.sumOfSquares = (count * (count + 1) * (2 * count + 1)) / 6;
    this.difference = this.squareOfSum - this.sumOfSquares;
  }
}