difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.

sum_and_square.rb

#difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
class Sum
def self.sum(number_set)
  sum = (number_set).map { |i| i*i }.reduce(:+)
    #put here the sum of squares of the numbers
  return sum
end

def self.square(number_set)
  square = (number_set).reduce(:+)**2
    # put the square of the sum of the numbers
  return square
end

def self.difference(number_set)
  difference = (number_set).reduce(:+)**2 - (number_set).map { |i| i*i }.reduce(:+)
  return difference
end
obj=Sum.new
output=Sum.difference(1..100)
puts"difference between the sum of the squares of the first one hundred natural numbers and the square of the sum is #{output}"
end